Forward Calorimeter Expert
Contents
For Expert Only!!
Brief overview of electronics
There are 7 anagate Quattros, and 4 power chassis. Each anagate has 4 ports labeled A, B, C, D in the Expert GUI. Each power chassy can be broken up into a left and right half with 4 power supplies in each half. The power supplies in each half can be power cycled by an anagate via an I/O cable. Not all cables were made properly so a few busses will not power cycle, tests still need to be done to find which busses this affects.
The Expert GUI
Looking at the FCAL by anagate Quattro and ports can help troubleshoot problems common to bases on a strand. The GUI shown in Figure 1 shows the 7 Quattro as they would look like on the FCAL platform. From this GUI one can enable the HV to bases on a strand or quattro level. At the moment power cycling is not integrated into EPICS so read the next section for instructions.
Power cycling a bus
To power cycle a bus do the following:
1. Login as hdops on any gluon computer
2. Go to "/gluonfs1/gluex/Subsystems/FCAL/manny_scripts/temp/newBaseControl" and type "source setup"
3. Type "pChControl"
4. Type "5" Write Anagate Digital
5. Select the Quattro number as shown in Figure 1
6. Select the Port to power cycle
Rebooting the IOC
If a base needs to have its HV disabled and you are unable to do so from the GUI you may need to reboot the IOC. To do this:
1. Login to gluon30 with hdops
2. Connect the to the IOC by entering "telnet localhost 27000" on the command line
3. To reboot the IOC enter "ctrl + x". The IOC will take a few minutes to reconnect
4. To exit the IOC enter "ctrl + ]" and then "quit"
Finding Bases
Keeping track of 2800 channels can be difficult, especially when you may be searching for 1 or 2 bases with very high HV. Below is a description on how to use a script to do this sort of analysis quickly. One a bad channel is found you should confirm the reading by going to the FCAL GUI and displaying the strand and quarter this troublesome base belongs to.
1. Login as hdops and go to "
