TECHNICAL SPECIFICATION

for the ESR D2 Dipole Magnets Quality Classification: A-3

Prepared By:

_____________________________________________ Date: __________________ George Mahler, Deputy Group Leader – Magnet Systems

Reviewed By:

_____________________________________________ Date: __________________ Sara Notaro, Technical Representative

_____________________________________________ Date: __________________ Eduardo Pereira, Quality Representative

_____________________________________________ Date: __________________ Chuck Schaefer, ESH Manager

_____________________________________________ Date: __________________ Cindy Galdamez, Procurement Liaison Engineer

_____________________________________________ Date: __________________ Joseph Tuozzolo, Technical Systems Division Director

_____________________________________________ Date: __________________ Sergei Nagaitsev, Technical Director

Approved By:

_____________________________________________ Date: __________________ Christoph Montag, Electron Storage Ring L2 Manager Electron-Ion Collider, Brookhaven National Laboratory

2 National Synchrotron Light Source II

Electron-Ion Collider, Brookhaven National Laboratory

Version n 10 of 8 nnMon2009 Brookhaven National Laboratory This information is controlled by the U.S. Department of Commerce Export Administration Regulations 15 CFR Parts 730-774 as EAR99 Technology

REVISION HISTORY

Revisions to drawing numbers and configuration quantities.

Table of Contents

LIST OF ACRONYMS

Technical Specification for the ESR D2 Dipole Magnets

1 SCOPE

This specification defines the technical requirements for the ESR D2 Dipole Magnets to be used at the Electron-Ion Collider (EIC) at Brookhaven National Laboratory (BNL) managed by Brookhaven Science Associates (BSA).

1.1 Background

The EIC Project will design, build, and install the accelerator hardware for a new Electron Storage Ring, an electron injector, and modifications to the hadron ring required to produce an electron ion collider and infrastructure. It will include one interaction region, with an allowance for a second, and one detector. The facility is designed to meet requirements to ensure high reliability and availability for the user program.

Conventional beam line accelerator magnets will be used to bend and focus high energy and high intensity electron beams in the EIC Rapid Cycling Synchrotron ring (RCS) and the EIC Electron Storage Ring (ESR). The RCS will be located outside the existing Relativistic Heavy Ion Collider (RHIC) tunnel, while the ESR will be located in the existing tunnel.

1.1.1 Magnet Details

The ESR dipole magnets will store the polarized electron beam for the EIC particle collisions for hours at various energies, depending on the science program, from 5 GeV to 18 GeV. Therefore, the ESR dipoles will operate at constant field/current. These magnets shall be fabricated with high quality laminated steel to provide high field quality. For production magnets all the core laminations from different production heats shall be shuffled in an organized fashion to provide minimal differences in magnetic field strength from magnet to magnet.

2 APPLICABLE DOCUMENTS

The following specifications, standards and drawings form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be that in effect on the date of the solicitation or contract. Exceptions must be approved in writing by BSA.

In the event of a conflict between the applicable documents and this specification, the Contractor shall immediately notify the BSA contract representative who shall in each instance determine which document takes precedence and advise the Contractor accordingly. Failure to notify the BSA contract representative of a document conflict shall not relieve the Contractor’s responsibility to ensure full compliance to all requirements.

3 TECHNICAL SPECIFICATION

This technical specification is for a complete particle accelerator dipole magnet assembly ready for final testing by the Contractor and then magnetic measurement and installation on a magnet girder assembly by BSA. The magnet design shall meet the requirements of this specification and associated specification control drawings. The magnet core shall be fully assembled and painted in accordance with this specification and the referenced specification control drawings. The magnet coils shall be fabricated in accordance with this specification and the coil manufacturing drawings. The coils shall be properly mounted and secured in the core with proper cross-over and cable connections in accordance with the Contractor’s design.

3.1 Magnet Specifications

Table 3.1 provides magnet specifications. BSA has developed core and coil designs to properly meet the performance requirements for the EIC ESR. These dipole magnets are designed and analyzed with conservative magnetic field strengths in the core steel. Saturation effects are not expected for the current and magnetic field in the table.

Table 3.1 – Magnet Specifications

3.1.1 Magnet Design Requirements

The magnet shall be designed to meet the technical requirements of this specification and the dimension and tolerance requirements on the specification control drawings when the magnet is supported by the girder support points defined on the magnet core drawing. The magnet design shall include lifting points so that the magnet is not distorted when lifted. A lifting fixture shall be designed if the lifting hook/point is more than 1.5 meters above the magnet.

3.1.2 Magnet Coil Mounting

The magnet design shall include the coil mounting system within the magnet. The support system shall support the coils without deformation when the magnet is operating at maximum field and temperature specified in Table 3.1. Non-magnetic metals (aluminum, stainless steel, etc.) shall be used for the coil support. The coil support shall include an additional layer of radiation resistant ground insulation including minimum of 1/8” fiberglass or G10 insulation and an additional 2 layers of Kapton sheet with a minimum thickness of 0.004 inches. This ground insulation shall be between the coil and all contacting magnet core surfaces and metal/grounded coil support surfaces. The insulation shall be configured so the assembled magnet shall pass a > 5 kV Volts hipot test for one minute. The coil supports shall be designed to allow replacement of the coil and reuse of the coil support components.

3.2 Magnet Core Assembly

3.2.1 Magnet Core

The magnet core shall be produced by stacking steel laminations with high accuracy. The magnet steel for the laminations shall be supplied by the Contractor in accordance with Specification EIC-MSG-SPC-010. The steel laminations shall be electrically insulated and the core assemblies designed to prevent eddy current variations in the magnet gap field when the coil current changes. The laminations shall be welded to each other in a fashion that maintains the overall core mechanical tolerance and provides a rigid assembly for the magnet. The packing factor for the lamination steel shall be >95%. Alternate approaches such as through bolting and/or epoxying/chemically bonding may be used provided the method meets the mechanical, dimensional, electrical, and tolerance requirements and does not alter the magnetic properties in the magnet gap. Alternate approaches shall be approved in writing by the BSA technical representative prior to implementing.

3.2.2 Magnet Core Configuration

The magnet core shall meet the dimensional and tolerance requirements of drawing 2104M0025 and the associated magnet model. Drawing 2104M0025, D2 Magnet Assembly with Required Interfaces, includes interfaces for magnet support, survey points, vacuum support hardware, and end magnetic shims. The magnet fabrication and assembly drawings shall include interfaces for coil supports, cable termination components, magnet mounting, magnet lifting, and any other interface required by the final detailed magnet design.

3.2.3 Core Lamination Material

The dipole magnet cores are to be produced with laminated steel of cold rolled, annealed, magnetic iron. The laminations steel shall be supplied with ASTM C-5 coating to provide electrical insulation between laminations. Alternate insulation materials and methods can be used after review and approval in writing by the BSA technical representative. Lamination profile and dimensions are provided on drawing 2104M0041. All the laminations from different steel lots/heats shall be shuffled as per BSA directive based on BSA magnetic measurements of sample steel. This is to provide a consistent field strength magnet to magnet for the same excitation current.

3.2.4 Core Lamination Shape

The Contractor shall stamp or form the laminations to their final shape. The individual laminations shall meet the dimensional and tolerance requirements of drawing 2104M0025. The steel laminations shall be manufactured so that the magnetic properties are non-oriented/uniform in any direction in the lamination. The number of notches stamped on each lamination, location as indicated on drawing 2104M0041 represents the heat number of the steel supplied, e.g. 1 notch indicates heat #1, 2 notches indicate heat #2, etc. Variations to the lamination shape for weld preparations or other manufacturing improvements are allowed with prior review and approval by the BSA technical representative.

The lamination shall not be splitable. The beam line vacuum chamber installation and magnet coil installation or replacement will happen via the open midplane in the lamination stack.

3.2.5 Magnetic Shims

The design shall include provisions to allow for fastening additional pole shims to the ends of the magnet cores as shown in 2104M0025. The magnet shim assembly will adjust the magnetic length of the magnet core up to 10%. The magnet shim assembly will accommodate different pole shim profiles and have vertical adjustability as shown in 2104M0025. The magnet shim assembly will correct multipoles due to end-effects and possible differences in field integral between magnets.

3.2.6 Completed Core Assembly

All exterior surfaces of the completed stacked core assembly shall be free of rust and then primed and painted to the approved BSA colors with oil-based paint. Surfaces directly associated with the magnet poles as indicated on drawing 2104M0025 shall not be painted. Holes on drawing 2104M0025 defined for magnet survey, for magnet mounting, and threaded holes for coil and component mounting shall not be painted. Surfaces left unpainted shall be treated with a rust-inhibiting solution. The laminated core shall be visible, fully or in part, after assembly to provide a surface for survey monuments as indicated on 2104M0025.

3.3 Magnet Coils

The magnets shall be provided with internally water cooled, Oxygen Free High Conductivity Copper (OFHC) copper coils for the main coil winding. The coil turns, coil cross-section, coil leads, dimensions, and tolerances are specified in the supplied drawings 2104M0039 and 2104M0047. The coil turns shall be electrically insulated turn to turn and coil to ground with a fiberglass/vacuum impregnated epoxy system as described in 3.3.5. The D2 magnet also has a separate trim coil assembly specified in drawing 2104M0050.

The magnet coils have been designed to accommodate a wide range of fields. The coil turns, coil bus cross-section, coil resistance, and magnet inductance have been designed in concert with the power supply requirements and interconnect cabling specifications.

3.3.1 Coil Manufacturing

The coils shall be wound with appropriate minimum bend radii to prevent excessive distortion of the internal water passage or external dimensions. All bends shall be stress-relieved and any key-stoning due to bending of the conductor shall be mechanically removed by filing or grinding. The resulting sharp corners shall be radiused to match the straight conductor.

Continuous length conductors for the coils are preferred and up to two (2) brazed joints are permitted in a single coil. The braze connections shall not be in the bends or within 3” of the bends. The brazed joints shall be configured as shown on the coil specification control drawings. The braze material shall be Handy Harmon “Sil-Fos -15” braze without flux or BSA approved equivalent. Before installing a braze joint during coil fabrication, three (3) sample braze joints shall be performed with written instructions and manufacturing drawing. These sample braze joints shall be machined in half to verify full penetration of the braze material during the process. Any change in the process during production shall require fabrication and inspection of three (3) new samples.

The Contractor is responsible for designing and fabricating all the tooling necessary and developing and documenting the methods needed to consistently wind the coils, to make coil connections if needed, to install the water fittings and plugs as described in 3.3.7.

3.3.2 Main Coil Conductor Material

The main coil conductors shall be hollow OFHC, alloy C10100, with an annealed electrical conductivity of 101% of IACS @20°C in accordance with ASTM-B170-99. The copper shall be delivered in an annealed (dead soft temper) pancake configuration. The main conductor cross-section and centered water-cooling hole shall be defined in the magnet coil specification control drawings.

3.3.3 Trim Coil Construction & Assembly

The trim coil construction, assembly, and connections shall conform to the specification control drawing 2104M0050. Insulation of the trim coil conductor shall be glass fiber tape, amino-silane treated pure E-glass tape, or approved equivalent half-lap wound over the conductor or an approved equivalent polyimide coating, as specified in the specification control drawing 2104M0039.

3.3.4 Main Coil Insulation

The turn-to-turn insulation shall consist of glass fiber tape, amino-silane treated pure E-glass tape, or BSA approved equivalent, half-lap wound during the coil winding process. In accordance with the specification control drawing 2104M0039, the final wrapped turn-to-turn tape insulation layer shall be a minimum of 0.020" thick.

The assembly of the completed wound main coil and completed wound trim coil shall have an additional outer wrapping of glass fiber tape, amino-silane treated pure E-glass tape, or BSA approved equivalent, half-lap wound to provide ground insulation. This additional outer layer shall the main coils specified in drawings 2104M0039 and 2104M0047. The outer layer shall be a minimum of 1.0 mm (0.040") thick. Additional fiberglass roving or G10 filler blocks shall be used to eliminate any voids and un-reinforced epoxy only volumes at the transitions between the coil layers or near the coil end termination lead transitions or other locations before the final ground insulation winding.

3.3.5 Coil Impregnation and Epoxy System

The insulation between the bare copper turns and all the insulation layers shall be vacuum impregnated with bonding resins which shall be cured to bond the coil and insulation into a monolithic structure with mechanical strength. No voids or bubbles shall exist between the conductor and insulation and between the insulation layers. All insulating materials used shall be compatible with each other and the copper.

The preferred coil impregnating resin system is as follows:

and cured with:

NMA (Allied Chemical Company) Nadic Methyl Anhydride 90 pbw Acceleration of cure shall be through the use of:

DMP-30 (Rohm & Haas) Tridimethyl Amino Methyl Phenol. 1.5 pbw

In lieu of the above, an alternative epoxy mix may be submitted to the BSA technical representative for approval, with the exact impregnation epoxy mix formulation and curing cycle description. The alternate mix, however, must have equal or better physical properties and resistance to nuclear radiation at a minimum exposure of 1 x 10 8 Gy as the "preferred mix".

The vacuum impregnation and heated/pressurized curing cycle method with times, temperatures, and pressures shall be provided for review and approval in writing by the BSA technical representative. The epoxy shall be clear, and the finished coils shall not be painted with a pigmented sealer that will prevent inspection for bubbles or voids.

3.3.6 Coil Tooling

To maintain dimensional tolerances, rigid tooling shall be used for winding the conductor and for the curing cycle of the epoxy. The final coil sizing and curing operations shall be performed simultaneously. The form shall be designed to withstand the cure vacuum/pressure cycle used and to provide completed coils that meet the specified dimensions on the magnet coil specification control drawings. The coil assembly shall be painted with clear Dow Corning R-4-3117 or BSA technical representative approved equivalent conformal coating to protect the coil from moisture absorption after impregnation.

3.3.7 Coil Connections

All coil connections shall conform to drawings 2104M0039 and 2104M0047. The water system fittings shall be Parker Fluid connectors brass SAE 45° flared tube end/male pipe end. The inside diameter of the fittings shall have a minimum diameter of 3/16” [4.76 mm], matching the hole diameter of the main coil winding. The NPT tube end may be machined down and brazed to the coil as shown in the magnet coil specification control drawings. The electrical isolation break shall be provided by SynflexR® hoses type 3740 with orange non-perforated cover, electrically non-conductive or BSA technical representative approved equivalent. To reduce the possibility of radiation damage, the hoses shall not be routed between the magnet coils near the aperture of the magnet. Where electrical isolation is not required, copper tubing with BSA technical representative approved brass fittings shall be used.

3.3.8 Coil Terminals

The magnet coils shall be provided with terminal blocks or attachment flags for the cable termination lugs as shown in drawing 2104M0025. The terminal size and location shall be as specified in drawing 2104M0025.

3.3.9 Cable Termination and Coil Interface

The magnets shall be provided with cable terminations and interface bus connections to the upper and lower coils. The magnets shall also include the coil-to-coil interface bus. The weight of the cable termination assembly and the cable shall be supported by the core of the magnet not the magnet coil leads. Bus between coil ends and magnet input/output termination bus shall be sized for a current density of 1 A/mm^2 . All mating surfaces on the magnet coil, coil to termination bus, and the cable termination shall be silver plated to provide a low resistance joint. The terminal support insulation shall be sufficient to allow the magnet assembly to meet the test requirements. All terminations – power, trim, monitoring (thermal switches & water flow), etc. shall be labeled. These labels shall conform to the polarity convention that the BSA technical representative will supply.

3.3.10 Thermal Protection Monitoring

Thermal protection for the magnet coils shall be provided by thermal switches that open when the surface temperature exceeds a preset value of 150 F. The thermal switches shall be part number 3156-009-009 silhouette hermetic thermostats from Elmwood Sensors Inc., Pawtucket RI (w/terminals mounted at 90o, manual reset, solder connections, gold plated terminals, 16 mAmps D.C.) or equivalent as approved by the BSA technical representative. There shall be one thermal switch located on the water discharge end surface of each water-cooled coil (e.g., total two per dipole) that shall be in good thermal contact with the coil as indicated on drawing 2104M0025. On the water-cooled main coils and air cooled trim coils, there shall be one thermal switch per coil assembly located on the external surface in the middle of each coil as indicated on drawing 2104M0025. The thermal switches shall be electrically insulated from the copper conductor. The thermal switches shall be wired to a single terminal block that is located at a BSA technical representative approved location.

3.4 Construction/Layout/Location Requirements

3.4.1 Survey Monuments

Survey monument locations and configuration are defined in drawing 2104M0025. The survey monuments shall be permanently fixed directly to the stacked lamination core. HUBBS 1.5 SM-BNL-3PA shall be used for survey monuments.

3.4.2 Lifting Provisions

Lifting provisions shall be supplied on the magnet assembly as required to safely move and transport the assembly independently. All lifting equipment and fittings shall have a margin of safety of 3:1, and calculations shall be provided proving that this requirement has been achieved. The magnet assembly center of gravity shall be clearly and permanently marked.

3.5 Marking and Serialization

A nameplate shall be permanently attached to each magnet assembly that has the following information: manufacturer’s name, manufacturing date, magnet assembly drawing number, magnet resistance in milliohms, flow rate in GPM measured at operating pressure in PSI, and weight measured in lbs.

Each magnet coil shall be permanently marked with a label indicating drawing number, manufacturers name, date of manufacture, and serial number for the associated traveler test sheet.

3.6 Packaging/Shipping

The magnet assemblies shall be shipped fully assembled in facsimile with the drawing and engineering model 2104M0025. Protective packaging shall be designed, fabricated, and installed to ensure protection against natural and induced environments during shipping, delivery, and storage of the components. The magnet assemblies and any additional shipped components shall be blocked, braced, and protected from damage during shipment. Lifting provisions suitable for lifting the magnet assembly skid from above, as well as provisions for lifting via forklift shall be provided. Stress analysis for lifting points and support points shall be provided. All openings shall be sealed for shipment with an appropriate shrink wrap enclosure as well as a plywood case.

4 VERIFICATION

Appropriate inspection/tests shall be performed to ensure the magnet assemblies, and all components therein conform to all requirements in section 3 of this specification.

4.1 Classification of Inspections

The Contractor shall be responsible for inspections and tests listed herein using their own equipment and facilities. BSA may repeat some of these inspections and/or tests after delivery to ensure that the magnets meet BSA requirements at no cost to the Contractor. BSA will also perform magnetic measurements to ensure that the magnets meet BSA requirements at no cost to the Contractor.

4.2 Acceptance Testing

Acceptance inspections and tests shall be performed to verify that magnets meet the requirements established in Section 3 of this specification. Acceptance or approval of magnet components during the course of manufacturing shall not be construed as a guarantee of its acceptance in the magnet assembly. All magnets produced and delivered shall have satisfactorily passed the applicable acceptance tests prior to shipping. The acceptance test data for each delivered magnet assemblies shall be recorded on a “MAGNET INSPECTION DATA SHEET” (Attachment 1) and associated Contractor developed travelers. Rejected parts and assemblies shall be marked as such or physically isolated from accepted parts and magnet assemblies to ensure they are not inadvertently used.

4.2.1 Magnet Coil Inspection and Testing

After fabrication and before installation into the magnet assembly the individual coils shall be tested. The acceptance test data for each delivered coil shall be recorded on the “COIL INSPECTION DATA SHEET” (Attachment 1).

a. Coil dimensional measurement and visual inspection to confirm the coil bus cross-section, the coil turns, overall cured coil size and the coil lead location meets the drawing requirements within specified tolerances.

b. Coil water flow rate test after epoxy infusion recorded in GPM @ a pressure of 100 psi and ambient temperature in degrees F as indicated by the “MAGNET INSPECTION DATA SHEET”.

c. Coil flow passage shall be “ball” checked with a ball no smaller than 1/8” diameter before and after epoxy infusion to ensure that the water passage has not been distorted from the forming operations, brazing, or epoxy incursion during fabrication.

d. Coil water passage leak check prior to coil epoxy infusion and after infusion verify that the material, brazed joints, water end fittings, and end plugs are leak tight. This test shall be performed at a water pressure > 250 psi for a period of 60 minutes recorded in 15-minute intervals as indicated by the “MAGNET INSPECTION DATA SHEET”.

e. Coil ground insulation test after epoxy infusion and cure. The magnet coils shall be tested to 5000 V between the copper bus and the outer epoxy insulated surface. Evidence of insulation breakdown or damage or a leakage current which exceeds 10 microamps at 5000 volts DC shall be cause for rejection. Results to be recorded as indicated on “COIL INSPECTION DATA SHEET” (Attachment 1).

f. The turn-to-turn coil insulation shall be tested either by applying 1600 volts peak-to-peak high frequency for one minute across the coil terminals or by applying a 2000-volt peak impulse having a rise time of 1 to 5 microseconds. This is done by switching a capacitor across the terminals of the coil so that a resonant circuit is formed (a method similar to that described in AIEE conference paper No. 57-295, "High Voltage Surge Tests for Detecting Faults Between Turns of Rotating Machines"). There shall be no indication of breakdown between turns, as indicated by a scope trace of the oscillations (see Appendix A figures 1A and 1B). The actual scope trace for each coil must be attached to the data sheet. Results to be recorded as indicated on “COIL INSPECTION DATA SHEET” (Attachment 1).

g. Coil resistance verification from lead end to lead end. Results to be recorded as indicated on “COIL INSPECTION DATA SHEET” (Attachment 1).

4.2.2 Magnet Core Inspection

The magnet core dimensional measurement and visual inspection shall be done for the individual core segments and the assembled magnets to confirm that the cores meet the drawing requirements within the specified tolerance and fabricated in accordance with the technical specification.

4.2.3 Magnet Assembly Inspection and Test

The assembled magnet shall be inspected to verify conformance to the technical specification, the specification control drawings, and the approved manufacturing and assembly drawings. The core of the assembled magnet shall meet the appropriate dimensional and tolerance requirements. The install coils shall be properly supported so they meet the magnet assembly and coil drawing dimensional and tolerance requirements.

4.2.4 Magnet Assembly Electrical Tests

The following electrical tests and checks shall be done on the completed magnet assembly with the cable termination assemblies installed and connected to the coils.

· Ground insulation check: the copper bus of the assembled magnet main coil circuit with jumpers shall be tested to 5 kV with the magnet core as ground. The insulation to ground shall be tested to withstand 5000 volts DC for one minute applied between the conductor and the magnet core assembly. Evidence of insulation breakdown or damage or a leakage current which exceeds 10 microamps at 5000 volts DC shall be cause for rejection. Results to be recorded as indicated on “MAGNET INSPECTION DATA SHEET” (Attachment 1).

· The insulation between the main coil and the trim coil shall be tested after magnet assembly. The magnet coils shall be tested with a 5 kV differential between the main coil copper bus and the trim coil conductor. Evidence of insulation breakdown or damage or a leakage current which exceeds 10 microamps at 5000 volts DC shall be cause for rejection. The trim coil shall also be tested to 5 kV to ground, Results to be recorded on “COIL INSPECTION DATA SHEET” (Attachment 1).

· Ohmic resistance of the completed magnet coil circuit with jumpers between coils installed. Results to be recorded as indicated on “MAGNET INSPECTION DATA SHEET” (Attachment 1).

ATTACHMENT 1 - MAGNET ASSEMBLY INSPECTION DATA SHEET

Manufacturer: Serial No:

Magnet Assembly Drawing No: Date:

Purchase Order No.: ________________________________________

1. Hydrostatic Test By: Date: [ ]passed [ ]failed

2. Flow Test By: Date: [ ]passed [ ]failed

Flow (US gpm)

Coil Serial Number:_____________________ Coil Traveler and Coil Inspection Data Sheet Attached [ ] Coil Serial Number:_____________________ Coil Traveler and Coil Inspection Data Sheet Attached [ ] Coil Serial Number:_____________________ Coil Traveler and Coil Inspection Data Sheet Attached [ ] Coil Serial Number:_____________________ Coil Traveler and Coil Inspection Data Sheet Attached [ ]

3. Magnet Ground Insulation Check By: Date: [ ]passed [ ]failed

4. Magnet D.C. Resistance By: Date: [ ]passed [ ]failed

Leakage Current @ 5 kV DC micro amps

DC

Resistance

Ohms Temperature (oF)

5. Dimensional Compliance Check By: Date: _____[ ]passed [ ]failed

Notes:_______________________________________________________________________________

6. Visual Inspection By: Date: ________[ ]passed [ ]failed

Notes:________________________________________________________________________ COIL INSPECTION DATA SHEET (sheet 2 of 2)

Manufacturer: Serial No:

Coil Drawing No.: Date:

Purchase Order No.:_____________________________________

1. Ground Insulation Check By: Date: [ ]passed [ ]failed

Leakage Current @ 5000 Volts DC microamps

2. Turn-to-Turn Insulation Check By: Date:

1600 Volts peak-to-peak high frequency or 2000-volt impulse @ 1 to 5 microsecond rise time.

[ ] Scope Trace Attached [ ]passed [ ]failed

3. D.C. Resistance By: Date: [ ]passed [ ]failed

Coil Temperature (F): Resistance (Ohms):

4. Dimensional Compliance Check By: Date:

[ ]passed [ ]failed Notes:_____________________________________________________

5. Ball Test By:_______________________________________________Date:_______________

[ ]passed [ ]failed Notes:_____________________________________________________

6. Visual Inspection By: Date:

[ ]passed [ ]failed Notes:_____________________________________________________

Appendix A

Figure 1A - Ringing pattern for good coil.

Figure 1B - Ringing pattern for bad coil.

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