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). The driver here is that the name then gives the location of the pump (whereas labels like “Green #1” or “Red 10 o’clock” or “Green Prime” require more information to derive the position).
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
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 |
| 5 | Ion Pump Certificates of Performance (all 4 from original pumps) | Shipped with pumps |
Installation Instructions
Description | File |
|---|---|
Enable the high pressure resolution mode (this is a front-panel-only setting). |  |
Dispatcher Implementation
This dispatcher is part of kpfgreen (currently) and will be part of kpfred. There will be four dispatcher instances running each with a unique configuration file.
Values with $(NAME) note that the name of the ion pump will be specified in the configuration file and allow both ion pumps for a given cryostat to have a unique name (e.g., Ech and Coll for echelle side and collimator side.)
Keyword | Value | Type |
|---|---|---|
$(NAME)_CURR | The current at the pump in Amps. | Double - read only |
$(NAME)_VOLT | The voltage at the pump in … Volts. | Double - read only |
$(NAME)_STATUS | Current controller status - see manual for details | String - read only |
$(NAME)_PUMPON | Is the pump on? 0 - no 1 - yes 2 - unknown (most likely only at startup or if connection lost) If written, will apply that state. Unknown is a no-op on a write. | Enumerated - is writable. |
$(NAME)_LCK | Locks turning the pump off and on. 0 - Locked 1 - Unlocked | Enumerated |
$(NAME)_IP_MODEL | Model of the device as reported by the device. | String - read only |
$(NAME)_IP_FIRMWARE | Firmware version of the device as reported by the device. | String - read only |
DISP#XXXX | Usual dispatcher keywords. STOP - stops dispatcher CONN - IP address and port DEV - device name from config file STA - status and includes whether or not a connection is made. |
Configuration File
The required sections are:
main which points to service name and stdiosvc configuration file
device which has the details of the device
dispatcher which has the dispnum value and the $(NAME) variable
Configuration | Value | Explanation |
|---|---|---|
address | 192.168.23.149 auxrack-ionpump-3 | the IP address of the device, can include an optional name from /etc/hosts |
port | 23 | IP port to telnet to |
poll_time | 5 | how often to query for the data from the device |
device_name | Green Collimator IP | this is the value of the DISP#DEV keyword, so a long name is helpful |
cal | 1.00 | the calibration value, applied at the initial connection by the dispatcher, needs to be between 0 and 1 |
size | 2.0 | the size of the pump in L/s, should be 2.0 |
dispnum | 2 | the number of the dispatcher |
name | Coll | The short name used for keywords as $(NAME). The service name will include the name of the cryostate (kpfgreen / kpfred) and this is for the IP. |
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