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Bradford Holden (Unlicensed)

Steve Gibson

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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).

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Each ion pump is named with respect to its camera (Green /or Red) and the side of the spectrometer it is on (Echelle/Collimator). The driver here is that the name then echelle or collimator). Therefore the name 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).However: Brad - please let me know if this is too cumbersome!

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Relevant Devices

Description

Qty

Source

Part Number

Ion Pump

Controller

Controllers

4

Gamma1

SPC-1-P-S-1-US110-E-S-N

Ion

Pump

Pumps

4

Gamma1

3SDI1V5KNN (3S TiTan)

HV Cables [Air

Cables

]

4

Gamma1

10K-SC10-10K (10 m)

High Voltage Vacuum Feedthrough

2

Gamma1

HV Cables [Vacuum]

4

Custom

-

Gamma1

10K-TF3-5K (PTFE 3m long)

1 Gamma products were ordered through Edwards Vacuum (Western-US Gamma distributor)

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Relevant Functional Block Diagram

...

...

Cable Details

Action

Cable

Notes

1

GRN_ION_E: Read telemetry

Pressure, Voltage, Current and High Voltage Status 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

Status
colourGreen
titleON

These controls should have a lock applied so they cannot be accidentally switched.

6

GRN_ION_E: turn pump

Status
colourRed
titleOFF

7

GRN_ION_C: turn pump

Status
colourGreen
titleON

8

GRN_ION_C: turn pump

Status
colourRed
titleOFF

9

RED_ION_E: turn pump

Status
colourGreen
titleON

10

RED_ION_E: turn pump

Status
colourRed
titleOFF

11

RED_ION_C: turn pump

Status
colourGreen
titleON

12

RED_ION_C: turn pump

Status
colourRed
titleOFF

Required Adjustable Settings

...

Setting

...

When Needed

...

Notes

...

Build

...

Observing

...

Maintenance

Required Telemetry

...

Pump

...

Parameter

...

Report Frequency

...

Purpose

...

Notes

...

GRN_ION_E

...

Pressure

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Voltage

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Current

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

High Voltage Status

...

Once per minute

Status
colourRed
titleTBC

...

Ensure pump is on

...

GRN_ION_C

...

Pressure

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Voltage

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Current

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

High Voltage Status

...

Once per minute

Status
colourRed
titleTBC

...

Ensure pump is on

...

RED_ION_E

...

Pressure

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Voltage

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Current

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

High Voltage Status

...

Once per minute

Status
colourRed
titleTBC

...

Ensure pump is on

...

GRN_ION_C

...

Pressure

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Voltage

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

Current

...

Once per minute

Status
colourRed
titleTBC

...

Monitor cyrostat pressure

...

High Voltage Status

...

Once per minute

Status
colourRed
titleTBC

...

Ensure pump is on

Required Alarms

Parameter

Threshold

Notes

1

GRN_ION_E pressure too high

Status
colourRed
titleTBD

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

GRN_ION_C pressure too high

Status
colourRed
titleTBD

3

RED_ION_E pressure too high

Status
colourRed
titleTBD

4

RED_ION_C pressure too high

Status
colourRed
titleTBD

5

GRN_ION_E high voltage off

Status
colourRed
titleTBD

6

GRN_ION_C high voltage off

Status
colourRed
titleTBD

7

RED_ION_E high voltage off

Status
colourRed
titleTBD

8

RED_ION_C high voltage off

Status
colourRed
titleTBD

Qty

Details

Notes

Ethernet

4

Cat6 Copper Ethernet Cable M-M, 6 feet long

Entirely within Aux Rack

High Voltage [HV]

4

Part numbers within table and diagram above.

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Relevant Datasheets & Manuals

Description

File

Source

1

SPC Controller Spec Sheet

View file
nameSPCe_spec_L.pdf

https://www.gammavacuum.com/index.php/product?id=64

2

SPC Controller Manual

View file
nameSPC_User ManualREV_J.pdf

https://www.gammavacuum.com/index.php/product?id=64

3

SPC ModBus Register Map

View file
nameSPCe_ModbusRegisterMap_v2.xlsx

https://www.gammavacuum.com/index.php/product?id=64

4

Ion Pump specs
(Titan 3S-DI-1V-5K-N-N)

Image Modified

Screengrab of:

https://www.gammavacuum.com/products/small-titan-ion-pumps/3211/3s-titan-ion-pump?number=&c=17662

Device Command List for KPF

...

5

Ion Pump Certificates of Performance (all 4 from original pumps)

View file
name

...

Gamma Ion Pump Certificates (all 4).pdf

Shipped with pumps

...

Installation Instructions

Description

File

Enable the high pressure resolution mode

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:

Code Block
spc 01

which should return:

Code Block
OK 00 SPC2
Image Removed

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:

Code Block
s.send(('spc 0B' + "\r\n").encode())

View file
nameGamma_spc_from_web.zip

https://gist.github.com/tspspi/779d96f305f719082d2db1e201856375/revisions

3

SPC Firmware

View file
nameSPCe_v1_18_03_Update.zip

https://www.gammavacuum.com/index.php/product?id=64

4

SPC Labview Drivers
(likely not useful, but included for completeness' sake)

View file
nameGV_Labview_Drivers.zip

https://www.gammavacuum.com/index.php/product?id=64

Installation Instructions

Set IP Address

Press the ‘OK’ button to open the menu dialog:

image-20240209-201826.pngImage Added

Use the right arrow to go to the ‘Ethnt’ option:

image-20240209-201935.pngImage Added

Choose the ‘Addr’ setting:

image-20240209-202020.pngImage Added

Then:

Then go to the ‘Mask’ setting in the ‘Ethnt’ menu:

image-20240209-203455.pngImage Added

The subnet mask should be set to 255.255.255.0.

Then go to the ‘Gatewy’ setting in the ‘Ethnt’ menu:

image-20240209-203607.pngImage Added

The gateway should be set to 192.168.23.1.

(A gateway isn’t used by the KPF Private Network, but setting a value here just in case the device needs one).

Enable the high-resolution mode for reporting pressures (this is a front-panel-only setting).

Image Modified

Set IP Address

...

Dispatcher

...

Configuration File

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

The required sections are:

  1. main which points to service name and stdiosvc configuration file

  2. device which has the details of the device

  3. dispatcher which has the dispnum value and the $(NAME)

...

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

...

  1. 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.