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From the lower left corner of lcls home SC gun - X-ray/MISC+Global - select Decarad 1 or Decarad 2 to get the pydm display. It shows the read backs of the high voltage, the firmware number, a heartbeat, and the individual channel radiation read backs in approximate mr/hr. The GM tubes saturate with high radiation:
Screen shot of saturation curve from LND 714 datasheet - attached below.
Also , et al. It also has buttons to open a striptool for that decarad's dose rates and an archive viewer with the readbacks. Also on the pydm display is a place to type in the location of the system ("near CM35" for example) as well as positions for the individual heads ("near cavity 1", "between cavitiies 7 & 8", for example). These typed in values as well as the desired high voltage setting is saved across IOC reboots. All numeric values except for the heartbeat and firmware number are archived.
Showing path to get main decarad display, strip tool, and archive viewer.
Main decarad display.
n.b. The GM tubes saturate with high radiation:
Screen shot of saturation curve from LND 714 datasheet - attached below.
The radiation read back PV names are RADM:SYS0:x00:GAMMA_DOSE_RATE, where x is 1 or 2.
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- Order from
TECO - 80/20 - Get db9 cables from Doug
- Test digis in tunnel
- if cables ok, roll up other cable on reelIf not, get more cables
- Test a system in the tunnelstart softioc
- See what values HVSTAT getsRelease display
- Test software: displays, save/restore, archivingCable tags on cables
- Put caps on framesMake DB9/RJ50 cables
Cable Connection
Notes on cable connection (from email 8/12/21)
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