The ion pump installed in the Red Side electronics bay is used to
monitor the Red side dewar vacuum.
The software used to monitor the LRIS vacuum is also used to run
in conjunction with HIRES. Thus, stopping and starting the
software will impact the monitoring on both LRIS and HIRES.
As LRIS eng there are two commands available:
- ionshow - this will output a status of the LRIS and
HIRES ion pump monitoring. Below is an example output of
 lriseng@lris-red: ionshow
rsh-ing to k1server for ionpump...
--- Status of the k1server ion pump task
--- Current hires ion pump keyword values
hicur = 0.000000100 amp
hivolt = 2.900000 KV
himode = 1
histat = 3
--- Current lris ion pump keyword values
lrcur = 0.000000100 amp
lrvolt = 2.900000 KV
lrmode = 1
lrstat = 3
Note that when the pressure is very low, the hicur will read
0.00000000 amp. This is okay.
An indication that the ion pump is working is the following:
If the above values are not 1 and 3, see the trouble shooting entry.
- ionStart - restarts the monitoring process. This process
calls a script in the background on k1server. Following a
restart it takes about 5 minutes before valid readings are
displayed from an ionshow. An e-mail is sent to interested
staff that says the software was restarted and contains an
output from ionshow. When turning the power on via the
power gui, the software restart is initiated. See below for
an example output:
 lriseng@lris-red: ionStart
 + Suspended (tty input) rsh -l k1obs k1server ionStart
The current status of the LRIS ion pump may be reviewed in two
- A Current Status Graph is available from the intranet only.
- Run ionshow as lriseng on the lrisserver. See above
Software Twiki page
There is also a software twiki that Liz C. maintains. and is
available at: Twiki page
see the troubleshooting
page for basic troubleshooting
information. The software Twiki page also has helpful