Table of Contents:
Introduction
Each cryostat will have two ion pumps attached. One will be operated continuously and the second will sit idle as a backup. Each pump has a dedicated controller (for a total of four in the system).
Proposal: name each ion pump with respect to its camera (Green/Red) and the side of the spectrometer it is on (Echelle/Collimator)
Relevant Devices
Description | Qty | Source | Part Number |
|---|---|---|---|
Ion Pump Controller | 4 | Gamma | SPC-1-P-S-1-US110-E-S-N |
Ion Pump | 4 | Gamma | 3SDI1V5KNN (3S TiTan) |
Air Cables | 4 | Gamma | 10K-SC10-10K (10 m) |
Vacuum Cables | 4 | Custom | - |
Relevant Functional Block Diagram
Software Actions
Action | Notes | |
|---|---|---|
| 1 | GRN_ION_E: Read telemetry | Pressure, Voltage, and Current values reported as telemetry (see below) |
| 2 | GRN_ION_C: Read telemetry | |
| 3 | RED_ION_E: Read telemetry | |
| 4 | RED_ION_C: Read telemetry | |
| 5 | GRN_ION_E: turn pump on | These controls should have a lock applied so they cannot be accidentally switched. |
| 6 | GRN_ION_E: turn pump off | |
| 7 | GRN_ION_C: turn pump on | |
| 8 | GRN_ION_C: turn pump off | |
| 9 | RED_ION_E: turn pump on | |
| 10 | RED_ION_E: turn pump off | |
| 11 | RED_ION_C: turn pump on | |
| 12 | RED_ION_C: turn pump off |
Required Adjustable Settings
Setting | When Needed | Notes | ||
|---|---|---|---|---|
Build | Observing | Maintenance | ||
Required Telemetry
Parameter | Report Frequency | Purpose | Notes | |
|---|---|---|---|---|
| 1 | SG needs to update | |||
| 2 | ||||
| 3 | Green controller 1 pressure value | Once per minute (TBC) | Monitor green cyrostat pressure | |
| 4 | Green controller 2 pressure value | Once per minute (TBC) | Monitor green cyrostat pressure | |
| 5 | Red controller 1 pressure value | Once per minute (TBC) | Monitor red cyrostat pressure | |
| 6 | Red controller 2 pressure value | Once per minute (TBC) | Monitor red cyrostat pressure |
Required Alarms
Parameter | Threshold | Notes | |
|---|---|---|---|
| 1 | Green controller 1 pressure high | TBC | Only one pump per cyrostat will be in operation at any time. The alarm system would need to know which pump/controller is in operation at any time to monitor the correct pressure value. |
| 2 | Green controller 2 pressure high | TBC | |
| 3 | Red controller 1 pressure high | TBC | |
| 4 | Red controller 2 pressure high | TBC | |
| 5 | |||
| 6 | High Voltage turns off | ||
| 7 | |||
| 8 | |||
| 9 |
Relevant Datasheets & Manuals
Description | File | Source | |
|---|---|---|---|
| 1 | SPC Controller Spec Sheet | ||
| 2 | SPC Controller Manual | ||
| 3 | SPC ModBus Register Map | ||
| 4 | Ion Pump specs |  | Screengrab of: https://www.gammavacuum.com/products/small-titan-ion-pumps/3211/3s-titan-ion-pump?number=&c=17662 |
Device Command List for KPF
Noted as a ‘draft’ at this point as need to finalize Arc Detection command setting.
Relevant Software
Description | File | Source | |
|---|---|---|---|
| 1 | Snippit from device manual explaining simplicity of telnet connection. SG tested this with PuTTY and it works; simplest command to test is the device name: spc 01 which should return: OK 00 SPC2 |  | From page 14 of “SPC Controller Manual”, posted just above. Full command list starts on page 19 of same manual. (Steve is annotating the command list for KPF’s needs) |
| 2 | Python code that Steve lifted from web, slightly modified, and found it worked! Key part in here (I think) is the command structure; this is the 'Read Pressure' command: s.send(('spc 0B' + "\r\n").encode())
| https://gist.github.com/tspspi/779d96f305f719082d2db1e201856375/revisions | |
| 3 | SPC Firmware | ||
| 4 | SPC Labview Drivers |
Installation Instructions
Description | File |
|---|---|
Enable the high pressure resolution mode (this is a front-panel-only setting). |  |
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