- You lose network connectivity:
- 192 Subnet: halladaq-cat
[You cannot ping the crates in the hall, e.g.
for ROC25(L-arm) or ROC26(R-arm) you cannot ping the respective IP
(happex8, happex7). Also cannot ping spectrometer DAQ crates
like hallasfi4]
- 193 Subnet: compton
[You cannot ping the any Compton crate,
cannot reboot them.]
- Control crates
[Loss of network connectivity to controls IOCs]
For all of the above network problems, do the following to power cycle the respective network switch:
- Goto https://halla-pwr/
- Accept the certificate if asked.
- Username: halla-pwr
- Password: see the sheet near the white board in the counting room.
- Click "Power Management" on the left.
- You will see 9 outlets. Three are currently used:
- halladaq (192 DAQ subnet) -- full name is halladaq-cat
- hac-cat -- full name is hac-cat3550
- compton -- full name is compton-cat2950
- There is a bulb icon in column "outlet status". If the bulb is yellow the outlet is on. To power cycle the outlet, first turn it off by clicking the bulb (it will change to grey), wait a few seconds, then turn it back on again. This on/off will power cycle the network switch.
- You lose the IOC for the septum magnets:
[The current readback for the septa
goes white on the Hall A Tools GUI; probably you hear Bob's voice
telling you "Warning, Warning, the sweeper magnet current is
too low..."]
- Click the IOC's GUI (from the "Hall A Main Menu")
- You will see that the iocha49 is whited out (don't worry about
the "Rich detector" and "Waterfall Target" iocs being also
whited out, we don't use them for HAPPEX). If it is not whited
out, you have some other problem.
- Under "Reboot" you will see the URL for the reboot for
that IOC, in this case http://hareboot7.
- Go to a WWW browser, type in http://hareboot7 as the
address, and login: the username and password are both written on the piece
of paper on the wall near the whiteboard.
- Select "Immediate Reboot", under "Control Action", for the outlet marked
IOCHA49.
- Click "Apply"
- The green "ON" under State should changed to OFF.
- Wait a few minutes,
then the readout for the septa currents should reappear in the Hall A
Tools.
- If the septa currents are wrong (or zero), you will need to
return them to their proper settings - check the Whiteboard for
the setpoints.
- From the "HAll A Tools", go to the blue widget to the right of the
"I (A)" marker for the relevant arm, and select "SEP POWER SUPPLY".
- You will need to reset the interlocks, turn the Dump Switch CMD to
ON. You may see that the temperature readbacks are crossed out, and a
message about "Waiting for the Lakeshore to Initialize". Wait, be patient.
When the temperatures are properly readback, then (if the coil
temperatures are below 8 K), you can turn the Power Supply on.
- Once the supply is on, you can type in the correct set current.
You can change the ramp rate to 0.2 A/s (maxmimum allowed).
- If the temperatures are greater than 8K, then the septa need
to be cooled down; turn off the beam and wait until they cool to
below 8K.
- Check that the sweeper magnet is on and at the correct
current. Go to "Magnets" under the "Hall A Main Menu" and select
"Sweeper magnet".
-
You have quenched a septum magnet:
- Stop the HAPPEX run and start another one; you can leave the beam on
and take data on the other arm.
- The coil temperatures should start cooling down. When the cooling
starts to slow down (once you are down to 15 K or so), take away the
beam so that they can cool down below 7.8 K. Once they get below 7.8 K,
you can turn them on.
- From the "HAll A Tools", go to the blue widget to the right of the
"I (A)" marker for the relevant arm, and select "SEP POWER SUPPLY".
- You will need to reset the interlocks, turn the Dump Switch CMD to
ON. You may see that the temperature readbacks are crossed out, and a
message about "Waiting for the Lakeshore to Initialize". Wait, be patient.
When the temperatures are properly readback, then (if the coil
temperatures are below 8 K), you can turn the Power Supply on.
- Once the supply is on, you can type in the correct set current.
You can change the ramp rate to 0.2 A/s (maxmimum allowed).
-
You lose a magnet controls IOC for an HRS:
[The readbacks for either or both of the
HRS magnets go white on
the "Hall A Tools". Q1 will probably still read, it is on another
IOC]
For the Left HRS:
- Click the IOC's GUI (from the "Hall A Main Menu")
- You will see that the iocha14 is whited out (don't worry about
the "Rich detector" and "Waterfall Target" iocs being also
whited out, we don't use them for HAPPEX). If it is not whited
out, you have some other problem.
- Under "Reboot" you will see the URL for the reboot for
that IOC, in this case http://hareboot10.
- Go to a WWW browser, type in http://hareboot10 as the
address, login: the username and password are both written on the piece
of paper on the wall near the whiteboard.
- Select "Immediate Reboot", under "Control Action", for the outlet marked
IOCHA14.
- Click "Apply"
- The green "ON" under State should changed to OFF.
- Wait a few minutes,
then the readout for the magnets should reappear in Hall A Tools.
- Check the state of the magnets; if they are not ON and at
the correct currents, then go to Changing
momentum setting of HRS and Septum from the HAPPEX How to Page.
For the Right HRS:
- Go to the middle room, and look for the green button labelled
"Right Spectrometer Controls VME"; it is at the lower right of the
lower box of green reset buttons in one of the middle racks.
- Push the button, holding it for 3-4 seconds.
- Wait a few minutes,
then the readout for the magnets should reappear in Hall A Tools.
- Check the state of the magnets; if they are not ON and at
the correct currents, then go to Changing
momentum setting of HRS and Septum from the HAPPEX How to Page.
-
The Cavity Monitors stop working:
[There is beam, but bcmcav2 and/or bcmcav3 are close to zero ADC channels or negative.]
Reset the Cavity Crate:
- You should be an expert to do this: Lisa Kaufman, Bob Michaels, Bryan Moffit, Kent Paschke, Hachemi Benaoum, or Ryan Snyder
- Using your ops account, ssh to hlasrv
- At a command prompt type: cd /cs/opshome/medm
- Then at the command prompt type: medme &
- Click on "Execute", then go to File...Open...HappexBpm...HxBpmExpert_DN.adl
- You'll also need to open HxBpmExpert_UP.adl
- You should notice that the status box next to "Daughter PLL Locked" is dark orange.
- Go to a WWW browser, type in http://apcpdu28.jlab.org as the address.
- In the blue box on the left side of the screen, click on "Outlets."
- In the "Select Control Action" box, pick "Reboot immediate," then check box 8 and press "Next."
- Username and password can be found on a piece of paper on the wall near the whiteboard.
- Click "Apply."
- Now you just have to wait for the reboot to take place. It will turn the crate off, wait a bit and turn it back on again.
- To make sure the reset was successful, you should check that on the epics control screens, he heartbeat status buttons on both monitors should be blinking and the "Daughter PLL Locked" and the "Mother PLL Lock" status buttons should both be yellow. If they are not, the reset needs to be done again.
Setting Gains for both cavities:
- Set BCM Pre Gain to 11.
- Set BCM Post Gain to 1024.
- Set X Pre Gain to 9.
- Set X Post Gain to 18000.
- Set Y Pre Gain to 9.
- Set Y Post Gain to 18000.
Setting the phases for both cavities has to be done empirically:
- At the hlasrv command prompt, type: /a/user3/freyberg/medm/ts5500/launch_ts5500.csh
- Go to the screen labeled "ts5500.adl."
- Click on the Green buttons for the "Upstrm X phase," "Dwnstrm X phase," "Upstrm Y phase," and "Dwnstrm Y phase."
- On each of these screens, you want to look at the plot of Raw Data and adjust the phase until the spectrum is centered about 4.0.
- Once you've set the phases, you should look at the x and y position stripcharts. If the phases are set correctly, you should notice that the green and blue traces track each other perfectly.
- Take a 50k event spectrometer run.
- Analyze it using Podd, and then run: .x online.C+("cavities")
- If all is working well, you'll see plots as in halog 152495. Please halog the "Signals for Beam On" and "Correlations to Striplines" screens.
- Halog the epics control screens which have the gains and phases once you've verified things are working.
- Exit medme, and logout of hlasrv.
HAPPEX How To Page
David Armstrong,
Last modified: Sun Aug 21 13:43:19 EDT 2005