ESI_upgrade_Specs.pdf

Specifications

Electrospray ionization (ESI) upgrades to the selected ion flow tube in Plasma Chemistry and ion trap instrument in LaSR laboratory. Both instruments are getting a similar upgrade to allow study of both chemistry and spectroscopy on the same ions.

These upgrades should allow for at least 2 nA current. They should be similar in operation and mostly interchangeable except for issues relating to mating to the current instruments. Important dimensions for mating are included in the following.

The SIFT upgrade should have the following properties.

1. The upgrade should have an atmospheric pressure electrospray ionization source with stainless steel ion transport tube with the ability to move the glass capillary tip closer or further from the sampling tube. The source should also have a high voltage feedthrough to provide voltage to the ESI tip.

2. The upgrade should include a stainless steel transfer tube kit with tubes of various conductance in order to tune the cluster distribution.

3. The upgrade should have an ISO-100 compatible vacuum flange for differential pumping. Electrically feedthroughs for the appropriate voltages should be supplied.

4. The upgrade should have a reduced pressure isolated sampling flange with isolated sampling cone with both a KF-50 pumping port and a KF-25 pressure gauge port. Electrical feedthroughs should be supplied. The upstream and downstream faces should be ISO-100 flange compatible.

5. The upgrade should have an ISO-100 compatible vacuum chamber with a built in ion funnel. It should include a DB-37 electrical connector and a KF-50 pumping port and a KF-25 pressure gauge port. The funnel should be electrically isolated and include a mounting solution. The exit should be a conductance limiting lens.

This region should operate at approximately 2 Torr.

6. A thin gate valve should be included to ensure vacuum isolation for maintenance.

This will separate the ESI region with the ion transport region. The gate valve should be ISO-100 compatible and have 0.125” or less space between ion optics elements so that the ions are transported without a large gap.

7. The upgrade should include a rectilinear ion guide with an 8mm inscribed diameter for transporting the ions from the source to the ion bender region of the current SIFT. The guide should include asymptotic rods to apply an asymmetrical electrical field to drive the ions downstream.

8. The upgrade should include a vacuum chamber to house the rectilinear ion guide. It should include a high throughput Edwards NEXT-400D-HQ turbomolecular pump that is water cooled for running at high pressure. The chamber should be differentially pumped such that the ion guide spans 3 vacuum regions, including two stages that currently exist. The chamber encloses the upstream portion of the ion guide and will operate at 5 mTorr. The second and third regions are in the existing system. The new ion guide should extend into these regions for a total distance 10.76” from the atmospheric flange face of the existing chamber. The downstream face of the chamber should be compatible with an 8” conflat.

9. The pump should have an inlet screen, an air cooling kit, a vent valve, a TIC Turbo Controller, and a water cooling accessory. It should be capable of running at 8mTorr.

10. The upgrade should include a 10 channel isolated optics power supply with embedded digital control with readback for all ten voltages. It should also control and read up to 5 additional voltages. The power supply should provide connection for a floating voltage of up to 3KV. Each element should transfer +/- 400 on top of the floating voltage. It should be rack mountable with 100-240 VAC, 50-60Hz power. It should include a vacuum interlock system.

11. Shipping should be included.

The ion trap upgrade should have the following properties.

1. The upgrade should have an atmospheric pressure electrospray ionization source with stainless steel ion transport tube with the ability to move the glass capillary tip closer or further from the sampling tube. The source should also have a high voltage feedthrough to provide voltage to the ESI tip.

2. The upgrade should include a stainless steel transfer tube kit with tubes of various conductance in order to tune the cluster distribution.

3. The upgrade should have an ISO-100 compatible vacuum cone for differential pumping. Electrically feedthroughs for the appropriate voltages should be supplied.

4. The upgrade should have a reduced pressure isolated sampling flange with isolated sampling cone with both a KF-50 pumping port and a KF-25 pressure gauge port. Electrical feedthroughs should be supplied. The upstream and downstream faces should be ISO-100 flange compatible.

5. The upgrade should have an ISO-100 compatible vacuum chamber with a built in ion funnel. It should include DB-37 electrical connector and a KF-50 pumping port and a KF-25 pressure gauge port. The funnel should be electrically isolated and include a mounting solution. The exit should be a conductance limiting lens.

This region should operate at approximately 2 Torr.

6. The upgrade should include a rectilinear ion guide with an 8mm inscribed diameter for transporting the ions from the source to the ion trap region. The guide should include asymptotic rods to apply an asymmetrical electrical field to drive the ions downstream.

7. The upgrade should include a vacuum chamber to house the rectilinear ion guide. It should include a high throughput Edwards NEXT-400D-HQ turbomolecular pump that is water cooled for running at high pressure. The chamber should be differentially pumped such that the ion guide spans 3 vacuum regions, including two stages that currently exist. The chamber encloses the upstream portion of the ion guide and will operate at 5 mTorr. The second and third regions are in the existing system. The new ion guide should extend into these regions for a total distance 10.76” from the atmospheric flange face of the existing chamber. The pump should have an inlet screen, an air cooling kit, a vent valve, a TIC Turbo Controller, and a water cooling accessory. It should be capable of running at 8mTorr. The downstream face should be an 8” conflat compatible.

8. The upgrade should include a 10 channel optics power supply with embedded digital control with readback for all ten voltages. It should also control and read up to 5 additional voltages. Each element should be capable of supplying +/-400.

It should be rack mountable with 100-240 VAC, 50-60Hz power. It should include a vacuum interlock system.

9. The upgrade should include an RF Power Supply Controller, rack mountable in a 19” rack.

10. The upgrade should include a High-Q Head, with Jumper-Able Frequency Option, Requiring External Frequency Source. It should be compatible with the current 2000 amu system. It should include a vacuum interlock system. It should be suitable for running an ion funnel and should have an input for a DC offset.

Should include RG-62 Cables to mate to MHV connectors at either end.

11. Shipping should be included.