4) AL-1613-0852 ALS-U - White Beam Slit and Pink Beam Slits and Screens TS.pdf

AL-1613-0852 Rev. A Doc. Status: Released Page 1 of 23

Advanced Light Source Upgrade Project

Lawrence Berkeley National Laboratory All officially released LBNL documents are watermarked and contain LBNL Document Control Center release information in the lower-left corner of the document's pages.

Printed hard copies of this document are for reference only.

TS: ALS-U, White Beam Slit and Pink Beam Slits &

Screens

Henry P. Alvarez

Release Date: Jul 17 2024 11:51:09 AM PDT

Document Number: AL-1613-0852 Revision: A

Document Status: Released

Document Type: SPECIFICATION

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TABLE OF CONTENTS

1 Revision History

2 Approvals

3 Abbreviations and Acronyms

4 Applicable Documents

5 Introduction

5.1 Requirement definition

5.2 Identification number

6 Overview

6.1 Scope

6.2 CSYS

6.3 Environment

7 Diagnostic Specifications

7.1 White beam slit COSMIC 7.0.1 AP101

7.1.1 Performance

7.1.2 Internals

7.2 Pink beam slit

7.2.1 Performance

7.2.2 Internals

7.3 Diagnostic screen

7.3.1 Performance

7.3.2 Internals

8 General Requirements

8.1 UHV performance

8.2 Ports

8.3 Support

8.4 Actuators and Electrical Hardware

8.5 Integration

8.5.1 Units and hardware policy

8.5.2 CAD Integration

8.5.3 S&A

8.5.4 Lifting provisions

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8.5.5 Utilities

8.6 EH&S

8.6.1 Radiation

8.6.2 Electrical

8.6.3 Seismic

9 FAT

9.1 General inspection

9.2 UHV acceptance

9.3 Positioning performance

9.4 Stability performance

10 Labelling

11 Standards and Codes

12 References ci al ly R el ea se d to th e

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1 REVISION HISTORY

Rev. CM Number Description of Change

A Baseline

2 APPROVALS

The following individual(s) shall review this document:

Reviewer Project Role

Antoine Wojdyla ALS-U BOSS Optical Scientist

Arnaud Allézy ALS Senior Mechanical Engineer

Maxime Bergeret ALS-U BOSS IDBL Technical Lead

Khoi Diep ALS-U BOSS IDBL Cable Manager

The following individual(s) shall approve this document:

Approver Project Role

Elaine DiMasi ALS-U BOSS System Manager

Shrenik Shah ALS-U BOSS IDBL Control Account Manager ci al ly R el ea se d to th e

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3 ABBREVIATIONS AND ACRONYMS

ALS Advanced Light Source

ALS-U Advanced Light Source Upgrade

CMM Coordinate-Measuring Machine

CAD Computer-Aided Design

CF ConFlat

COSMIC Coherent Scattering and Microscopy (Beamline)

CSYS Coordinate System

CVD Chemical Vapor Deposition

DEF Definition

FAT Factory Acceptance Test

FATP Factory Acceptance Test Plan

FNF First Natural Frequency fps Frames per Second

ID Identification

IDBL Insertion Device Beamlines

LBNL Lawrence Berkeley National Laboratory

MIM Minimum Incremental Motion

MAESTRO Microelectronic And Electronic Structure Observatory (Beamline)

N/A Not Applicable

NUM Number

PPD Peak Power Density

RMS root-mean-squared

RTD Resistance Temperature Detector

S&A Survey and Alignment

SI International System of Units

SR Synchrotron Radiation

TC Thermocouple

UHV Ultra-High Vacuum ci al ly R el ea se d to th e

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4 APPLICABLE DOCUMENTS

This section identifies applicable documents that are considered to be a part of this document. All information contained in an applicable document shall be valid to the full extent, unless specifically noted within this document.

Number Rev. Title

27K813 C HEYS NEST FIDUCIAL POST

29E064 C COMPACT FIDUCIAL POST

M7957A A ALS Beamline Coordinate Systems

AL-1009-9880 B ALS-U Units Definition

AL-1220-7841 F UHV Chamber and Component Production Requirements

AL-1595-3412 C Drawing: MAESTRO 7.0.2 Pink Beam Slit/Screen Interface

AL-1595-2995 C Drawing: COSMIC 7.0.1 White Beam Slit Interface

AL-1595-3099 C Drawing: COSMIC 7.0.1 Pink Beam Slit/Screen Interface

5 INTRODUCTION

The purpose of this technical specification is to provide information needed by the

Subcontractor to design, fabricate, control and ship beamline diagnostic slits and screens for the ALS-U project. These diagnostics will be installed on the IDBL:

- COSMIC 7.0.1 dedicated to imaging techniques in the 164-2,500 eV nominal photon energy range

- MAESTRO 7.0.2 dedicated to angle-resolved photoemission spectroscopy in the

20-960 eV nominal photon energy range

5.1 Requirement definition

Shall, should, may, and will are used to define every requirement listed in this document.

The definitions of these terms are as follows:

- Shall is a requirement that must be implemented

- Should indicates a desire and can be interpreted as ‘best effort’

- May indicates a desire and can be interpreted as ‘nice to have’

- Will is used to inform intent or declaration of purpose and is not a requirement ci al ly R el ea se d to th e

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5.2 Identification number

Each requirement stated in this document shall have a unique ID NUM. Once an ID

NUM has been assigned to a specific requirement, the ID NUM cannot be changed or reassigned.

The ID NUM formant is as follows: QQQQ, where QQQQ is a unique four digit number.

6 OVERVIEW

Each of the diagnostics comes with unique requirements for design, fabrication, and testing. The sections applicable to the diagnostics are subdivided into three subsections:

- Performance: for key performance features, including precision and stability

- Internals: for materials that can intercept the beam

- Port: for required ports, and their vacuum components

In addition, all diagnostics must meet shared requirements as specified in Section 8.6.1, and must undergo FAT as outlined in Section 0.

6.1 Scope

The diagnostics detailed within this technical specification are listed in Table 6.1. The pink beam slit and screen will share a granite support system, ultimately becoming a unit and shipped as a unit. Table 6.1 also identifies the interface drawing for each diagnostic that controls the entrance and exit flanges and the maximum spatial envelope. While the interface drawings are unique, the Subcontractor should place significant emphasis on standardizing the design of the pink beam slit and screen to the greatest extent possible for each diagnostic type.

Table 6.1. Diagnostics described in this technical specification and the interface drawing.

Beamline Label Type Interface Drawing

COSMIC 7.0.1 AP101 White Beam Slit AL-1595-2995

MAESTRO 7.0.2 AP201/DIAG201 Pink Beam Slit and Screen AL-1595-3412

COSMIC 7.0.1 AP102/DIAG102 Pink Beam Slit and Screen AL-1595-3099

6.2 CSYS

The CSYS is used in this document, with its orientation such that the Z-axis is in the direction of the beam propagation from the source, and the Y-axis is normal to the floor.

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6.3 Environment

All diagnostics will operate at the experimental floor of the ALS facility. The requirements listed throughout this document shall be guaranteed by the Subcontractor in an environment with comparable humidity, temperature stability and floor vibration levels.

The temperature is set to 22.5 °C ± 1.5 °C. Figure 6.1 shows the integrated rms displacements, which are about 5.6 nm and 22 nm RMS integrated above 10 Hz in the lateral and vertical directions respectively. Strong external disturbances can be seen at specific frequencies, specifically at 60 Hz in the vertical direction and at 120 Hz in the lateral direction. The Subcontractor shall design diagnostics that avoid resonance at these frequencies. LBNL can provide the vibration data to help the Subcontractor quantify the environment and optimize the diagnostics designs.

Figure 6.1. Integrated RMS displacement measured on the ALS experimental floor.

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7 DIAGNOSTIC SPECIFICATIONS

7.1 White beam slit COSMIC 7.0.1 AP101

7.1.1 Performance

ID NUM DEF System Performance Requirements Value Unit

0001 Shall Maximum XY aperture size 25 x 25 mm × mm

0002 Shall XY blade overlap (fully closed) 5 mm

0003 Shall Blade position bidirectional repeatability 50 µm

0004 Shall Blade position resolution <10 µm

0005 Shall Blade stability (>10 Hz RMS) 20 µm

0006 Shall FNF 80 Hz

0007 Shall Distance between the downstream X defining blade and the upstream Y defining blade

<50 mm

ID NUM Requirement

0008 Each blade shall be electrically isolated

Shall provide charge collection capabilities where each blade is wired to a standard connector feedthrough

0010 The linear motion of each blade shall be motorized

0011 Shall provide active cooling for each blade

Shall provide water cooling and feedthrough(s), utilizing a design in which the water to vacuum interface is a continuous component with no internal welds, fittings, or other surface boundaries that could be susceptible to leak or rupture.

0013 At least 1x temperature sensor shall be affixed to each blade (TC or RTD)

7.1.2 Internals

The only parts of the white beam slits capable of intercepting the beam are the blades.

These blades shall be made of materials optimized for high heat loads, and shall be sized for each blade to intercept the full SR fan, which is +5.41 mm and -6.87 mm in X by

+6.99 mm and -6.99 mm in Y, at this location.

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Table 7.2 lists the incident power, the PPD (at normal incidence). The blades shall also adhere to strict criteria for surface finish and geometrical tolerances, see ID NUM 0015, 0016, 0017, and 0018 listed in the following table.

ID NUM DEF Slit Blade Requirements Value Unit

0014 Shall Blade material and thickness: Tungsten >2 mm

0015 Shall Design power load AL-1747-8192 N/A

0016 Shall Blade edge surface finish <2.5 µm RMS

0017 Shall Blade body surface finish 10 µm RMS

0018 Shall Straightness 5 µm

0019 Shall Blade to blade parallelism 10 µm

Table 7.1. Design power load for the white beam slit.

Beamline

PPD

[W/mm2]

Incident Power

[kW]

COSMIC 7.0.1 21.5 1.25

LBNL will provide the numerical power density data that can be mapped to an FEA model.

7.2 Pink beam slit

7.2.1 Performance

ID NUM DEF System Performance Requirements Value Unit

0020 Shall Maximum XY aperture size 25 x 25 mm × mm

0021 Shall XY blade overlap (fully closed) 5 mm

0022 Shall Blade position bidirectional repeatability 50 µm

0023 Shall Blade position resolution 10 µm

0024 Shall Blade stability (> 10Hz RMS) 20 µm

0025 Shall FNF 80 Hz

0026 Shall Distance between the downstream X defining blade and the upstream Y defining blade < 50 mm ci al ly R el ea se d to th e

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0027 Each blade shall be electrically isolated

Shall provide charge collection capabilities where each blade is wired to a standard connector feedthrough

0029 The linear motion of each blade shall be motorized

0030 Shall provide active cooling for each blade

Shall provide water cooling and feedthrough(s), utilizing a design in which the water to vacuum interface is a continuous component with no internal welds, fittings, or other

0032 At least 1x temperature sensor shall be affixed to each blade (TC or RTD)

7.2.2 Internals

The only parts of the pink beam slits capable of intercepting the beam are the blades.

These blades shall be made of materials optimized for high heat loads, and shall be sized for each blade to intercept the full SR fan, which is +/- 12.16 mm in X by +/- 12.09 mm in

Y at COSMIC, and +/- 18.13 mm in X by +/- 9.25 mm in Y at MAESTRO.

Table 7.2 lists the incident power, the PPD (at normal incidence). The blades shall also adhere to strict criteria for surface finish and geometrical tolerances, see table below

ID NUM DEF Slit Blade Requirements Value Unit

0033 Shall Blade material and thickness: Tungsten >2 mm

0034 Shall Design power load AL-1747-8192 N/A

0035 Shall Blade edge surface finish <2.5 µm RMS

0036 Shall Blade body surface finish 10 µm RMS

0037 Shall Straightness 5 µm

0038 Shall Blade to blade parallelism 10 µm

Table 7.2. Design power load for the pink beam slits [3].

Beamline

PPD

[W/mm2]

Incident Power

[W]

MAESTRO 7.0.2 1.1 105

COSMIC 7.0.1 2.5 175

During kick-off, LBNL will provide the numerical data; which can be mapped to an FEA model.

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7.3 Diagnostic screen

7.3.1 Performance

The screen’s motion shall be motorized. The range of motion available shall be: full retraction (no portion of the beam is intercepted) to full insertion (center of the screen at beam axis)

0047 The camera’s optical axis shall be normal to the inserted screen.

0048 Shall provide water cooling and feedthrough(s), utilizing a design in which the water to vacuum interface is a continuous component with no internal welds, fittings, or other

0049 At least 2x temperature sensors shall be affixed to the CVD screen (TC or RTD)

7.3.2 Internals

The only part capable of intercepting the beam within the position-sensing screen is the screen. The screen shall be made of scintillator material that converts X-rays into visible light.

Table 7.3 lists the incident power, the PPD (at normal incidence), and the beam size that shall be considered by the Subcontractor.

ID NUM DEF Slit Blade Requirements Value Unit

Shall

Screen material Graphitized reticles, centered on CVD screen (to indicate the center of the beamline)

Diamond

CVD

N- or B-doped

N/A

Shall Design power load

Table 7.3 N/A

0052 Shall Minimum screen size 15 × 15 (XY) mm × mm

ID NUM DEF System Performance Requirements Value Unit

0039 Shall Sensing screen motion repeatability 50 µm

0040 Shall Sensing screen motion resolution 10 µm

0041 Shall Sensing screen stability (> 10Hz RMS) 20 µm

0042 Shall Field of View 15 × 15 mm × mm

0043 Shall Object resolution 10 µm

0044 Should Object resolution 30 µm

0045 Shall Camera frame rate >100 fps ci al ly R el ea se d to th e

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ID NUM DEF Slit Blade Requirements Value Unit

0053 Shall Screen angle of incidence 45 deg

Table 7.3. Design power load for the diagnostic screens [3].

*The power density is for normal incidence

Beamline

PPD*

[W/mm2]

Incident Power

[W]

MAESTRO 7.0.2 1.1 105

COSMIC 7.0.1 2.5 175

During kick-off, LBNL will provide the numerical data; which can be altered for the correct angle of incidence, as listed in 0047, and appropriately mapped to an FEA model.

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8 GENERAL REQUIREMENTS

8.1 UHV performance

ID NUM Requirement

0054 The UHV chamber shall be made of stainless steel

0055 Design, manufacturing, and testing of the diagnostics shall meet all requirements listed in AL-1220-7841

0056 Swappable heating wires, tapes and/or jackets for bakeout shall be attached to the UHV chamber

0057 Split heater-tape connectors shall be permanently bonded together to form one assembly or replaced with a single, unified connector (split connectors are not allowed)

0058 Bakeout electrical hardware input voltage shall be 110 VAC, 60 Hz

0059 Bakeout connectors shall be removed before shipping (i.e. flying leads)

0060 The implementation of LVP greases such as Krytox shall not be accepted

0061 All fasteners used in UHV shall be silver plated and vented

0062 Silver plated 12-point bolts should be used for all flanges

ID NUM DEF Requirement Description Value Unit

0063 Shall Total pressure, without beam and after bake out

0.5 nTorr

8.2 Ports

The white beam slit is considered to be a stand-alone unit. However, the pink beam slit and screen may be mated by a flange connection, making them a unit. The ports listed below are intended to be for the unit, and can be implemented at either chamber. For each unit, the Subontractor shall provide the pump, valve, burst disk, and gauges specified in requirement 0053.

ID NUM Requirement

The chamber shall feature the following ports:

- 1 × DN100CF for a SAES NEXTorr Z-1000-10

- 1 × DN40CF for an angle valve 54132-GE02 VAT for roughing

- 1 × DN40CF for a bust disk BDA-133-ASME MDC

- 1 × DN40CF for a Pirani gauge 103170034SH MKS

- 1 × DN40CF for a Cold cathode 104220008 MKS

- 1 × DN40CF (spare)

- Port for drain current feedthroughs

- Port for temperature sensor(s) feedthroughs ci al ly R el ea se d to th e

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8.3 Support

A rigid stand with a six DoF alignment system shall support the diagnostics. The stand shall be made of natural granite. The material properties shall meet specific values to mitigate position drift of supported components. In addition, the design shall be compatible with a mounting plate that will be supplied by LBNL to secure the diagnostic stand to the floor.

ID NUM Requirement

The Subcontractor shall propose pockets in the granite with through holes to allow for mounting to an interface plate. This will be reviewed and approved by LBNL

The stand should be made of a natural granite:

- Density: 2,900 to 3,200 kg.m-3

- Thermal conductivity: 2.3 to 2.8 W.m-1.K-1

- CTE: <6.5 ppm.C-1

ID NUM DEF Mechanical Requirements Value Unit

0067 Shall Linear adjustment range ±10 (XYZ) mm

0068 Shall Linear adjustment resolution 20 µm

0069 Shall Angular adjustment range ± 2 deg

0070 Shall Angular adjustment resolution 1 mrad ci al ly R el ea se d to th e

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8.4 Actuators and Electrical Hardware

The Subcontractor shall provide the motors, encoders, switches, hard stops, and patch panels. Fail safe units shall be designed, meaning the hard stops must sustain the maximum force induced by the actuator drives without damaging the mechanics.

ID NUM Requirement

All motorized axes shall feature adjustable end switches and adjustable fail-safe mechanical hard stops

0072 All motorized axes shall feature absolute optical encoders

All motion control hardware shall be compatible with one of the following controllers:

Compumotor ACR9000, Galil DNC 41X3, Aerotech, and Newport XPS

All motion control hardware shall be compatible with the following drives: Compumotor E-AC, Galil 41X3, Aerotech, National Instruments MID-7604 and P70530

Patch panel shall be provided to connect to all motors, encoders, switches, drain current connection, temperature monitoring connections, and bias voltage connections.

All motion control hardware should be maintainable by a non-qualified electrical worker i.e. single cord and plug, <50 VAC and <100 VDC on all exposed wires, including finger safe connections

0077 All motion control hardware shall be available to purchase commercially

When internal DoF have run to their hard stops, or have been halted to avoid interference in other ways, it should be possible in most foreseeable circumstances to recover to their home positions without breaking chamber vacuum or opening the vessel

8.5 Integration

The units will be installed on the ALS experimental floor. Integration shall satisfy stringent space constraints and EH&S requirements.

8.5.1 Units and hardware policy

AL-1009-9880 specifies that the SI system of units shall be implemented by the

Subcontractor. All documents generated shall use the SI system, as shall fastener hardware, vacuum hardware, major components, and tooling.

ID NUM Requirement

All hardware shall be Metric, except in specific cases for which a deviation request, subject to review and approval by LBNL, demonstrates the benefit to using on Imperial ci al ly R el ea se d to th e

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8.5.2 CAD Integration

The ALS experimental floor is crowded and integration can be challenging. The

Subcontractor shall be responsible for supplying diagnostics that fit within the boundaries established by the LBNL interface drawings listed in Table 6.1. As shown in the drawings, protrusions are for removable equipment and actuators only. LBNL may authorize additional protrusions that exceed the envelope.

ID NUM Requirement

The final design shall comply with all space and protrusion requirements as expressed in the interface control drawings of Table 6.1. The final design shall be validated by CAD integration in the beamline model.

8.5.3 S&A

S&A uses laser trackers to align beamline components at the ALS. The Subcontractor shall develop and provide the S&A procedure. The procedure will be reviewed by LBNL to confirm that the procedure can be performed at the beamline.

ID NUM Requirement

The Subcontractor shall develop a S&A procedure achievable at the final foreseen location

Compact posts 29E064 or Heys nest 27K813 fiducial posts, or equivalent, LBNL reserves the right to determine equivalency, shall be used

8.5.4 Lifting provisions

Installation of diagnostics and granite supports to the respective beamlines will require the use of hoisting provisions or lifting eye bolts. The Subcontractor shall consider the interface drawings to develop compact, suitable, and safe designs for lifting provisions.

ID NUM Requirement

The Subcontractor shall develop and implement compact, suitable, and safe designs for lifting provisions.

8.5.5 Utilities

The diagnostics shall function with standard ALS utilities.

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ID NUM DEF Requirement Description Value Unit

0084 Should LCW maximum supply pressure 0.83 (120) MPa (psi)

0085 Should LCW maximum pressure drop 0.21 (30) MPa (psi)

0086 Shall LCW temperature 22.78 ± 0.1 °C

0087 Shall LCW pH level 7-8 N/A

0088 Shall LCW conductivity 1.75 μS

0089 Should Main electrical supply

VAC

Hz

0090 Shall Maximum water cooling velocity 4.0 m/s

8.6 EH&S

8.6.1 Radiation

The Subcontractor must design and fabricate vacuum chambers that meet LBNL’s shielding requirements to ensure the protection of personnel from synchrotron radiation.

The minimum stainless steel equivalent thicknesses are:

ID NUM DEF Requirement Description Value Unit

0091 Should For indirect radiation in white-beam >6 mm

0092 Should For indirect radiation in pink-beam >1 mm

The slit’s blades shall meet the requirements listed in 0014 and 0033, in the direction of beam propagation. All components of the vacuum chambers shall meet the requirements for indirect radiation. Commercial components and bellows shall be enclosed to ensure proper shielding. Alternatively, the subcontractor may opt for internal port covers, as shown in the figure below. These covers create a 'labyrinth' structure that can shield against scattered synchrotron radiation. It's important to note that welds are not credited for radiation shielding; therefore, require special considerations. Direct lines of sight through the weld from the optic to the outside shall be avoided, for example, as illustrated in Figure 8.1 below, using 'labyrinth' welds rather than corner or butt welds.

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Figure 8.1. Shielding examples, including a labyrinth weld, an internal port cover and a Tee coupling with thick walls.

8.6.2 Electrical

The Subcontractor shall provide the system interconnect and wire diagram. Electrical safety will be reviewed before giving formal approval for initiation of manufacturing activities to ensure all LBNL specifications are met.

ID NUM Requirement

0093 All electrical components should be UL/NRTL Listed

Every electrical component shall be listed with the function, voltage and power requirements

0095 All electrical components shall be subject to review and approval by LBNL

All system components shall have provisions for large wire grounding attachment points in the form of studs or threaded holes ci al ly R el ea se d to th e

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8.6.3 Seismic

The seismic anchorage shall be designed by LBNL. To this purpose, LBNL will design a mounting plate following the mounting plate tapped hole layout proposed by the

Subcontractor. LBNL incurs all associated costs, however the Subcontractor shall provide the following parameters and implement all recommendations made by the LBNL

Structural Engineer.

ID NUM Requirement

The Subcontractor shall provide the following parameters:

- The weight of the diagnostic

- The overall height, width, and depth

- The dimensioned location for the center of gravity (height and in plan)

- The magnitude and location of all vacuum loads on the diagnostic

In addition, the Subcontractor shall provide calculations that show that the systems, comply with the California Building Code. The design and calculations shall be reviewed and approved by the LBNL Structural Engineer. The seismic load requirements are around 0.37 g-force vertically and 1.00 g-force laterally, in any direction. LBNL may assist the Subcontractor in defining the seismic load requirements.

0098 The diagnostics shall comply with the California Building Code

9 FAT

The Subcontractor shall develop a FATP that demonstrates that all requirements listed throughout this specification are met in an environment that should be comparable to the

ALS. The FATP should be divided in four inspections: general inspection, UHV acceptance, positioning performance of the controlled axes, and stability performance.

ID NUM Requirement

All FAT shall be reported in written form and an electronic copy of all results shall be provided ci al ly R el ea se d to th e

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9.1 General inspection

The internal mechanics dimensional and geometric tolerances shall be measured on a

CMM

0101 Straightness of each blade shall be measured

Blade to blade parallelism for each blade pair shall be measured at the following locations: 10%, 25%, 50%, and 75% from each end.

0103 The linear travels of the motorized axes shall be measured

0104 All hard stops shall be tested by direct collisions at maximum speed at least five times

The water-cooling system shall be tested for at least 10 min at maximum pressure and flow and no leak shall appear

0106 Full dimensional reports of the parts credited in the shielding drawing

0107 The result of the water pressure drop measurement shall be provided.

9.2 UHV acceptance

The Subcontractor shall perform final UHV acceptance tests following AL-1220-7841 requirements in Section 14 of that document, including:

- Bakeout, Section 14.1

- RGA, Section 14.2

- Outgassing measurement, Section 4.3

- Final leak test, Section 14.4

- Final pressure measurement, Section 14.5 ci al ly R el ea se d to th e

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9.3 Positioning performance

Position repeatability, minimum incremental motion, and parasitic error motions (i.e.

angular, straightness, backlash, and vibration) shall be evaluated by measuring each individual axis. The procedure should be performed in vacuum with water-cooling at nominal flow and pressure.

ID NUM Requirement

Blade position repeatability at various positions (bidirectional, at least 20 consecutive cycles, reported as min/max), and minimum incremental motion, of all controlled axes shall be evaluated and reported

Screen position repeatability at various positions (bidirectional, at least 20 consecutive extension travel cycles), and minimum incremental motion, of all controlled axes shall be evaluated and reported

9.4 Stability performance

Stability typically suffers from external disturbances (e.g. background noise and thermal effects) and internal disturbances (e.g. water-cooling, vacuum equipment, system heating). The stability of each slit blade and screen shall be evaluated independently relative to ground motion. The procedure should be performed in vacuum with water-cooling at nominal flow and pressure. Unfiltered data shall be reported. The temperature and the floor vibration shall also be monitored and reported. Finally, the requirement shall be compared to the measured motion reported as the rms >10Hz.

ID NUM Requirement

The extended position stability of each slit blade shall be measured (>/=400 Hz for 5 min at 1 kHz sampling)

The extended position stability of the screens shall be measured (>/=400 Hz for 5 min at 1 kHz sampling)

10 LABELLING

0113 Each diagnostic assembly shall be serialized as indicated by LBNL

The outside chamber of each diagnostic shall be engraved to include the beamline name and the diagnostic label per Table 6.1 (e.g. COSMIC 7.0.1 AP101) ci al ly R el ea se d to th e

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11 STANDARDS AND CODES

Number Title

ISO 230 Test code for machine tools

Cal. Code Regs., Title 24 2019 California Building Code

ASCE 7-16

Minimum Design Loads and Associated Criteria for Buildings and Other Structures

12 REFERENCES

[1] Goldberg, Considering the Beamlines Slit Position Requirements, ALS-U

BOSS Diagnostics Memo, LBNL-ALS-U: AL-1750-7905, 2019.

[2] Goldberg, Enumeration of ID Beamline Diagnostics and Tasks, ALS-U BOSS

Diagnostics Memo LBNL-ALS-U: AL-1750-7906, 2019.

[3] Bergeret, Calculation of Power Load Requirements for White and Pink Beam

Diagnostics in BL07.0.1 and BL07.0.2, LBNL-ALS-U: AL-1673-6840, 2021.

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