LAC HV control

LAC HV control
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Basic Steps for HV controls

On CLAS10 login as user aiaces
user: aiaces
pass:*******
Give the following commands:
clas10>cd hvtk
clas10>lachv
3 windows will pop on your terminal screen:
- The LAChv Main Window
- and its Message Window
- The Control panel window

CAEN HV crate operations

Select the sector to operate on:
- menu FILES --> load sector1( or 2)
Read the HV values stored on the hardstatnewsec1(or 2) file
- menu EDIT --> V0
Monitor the actual HV values
- menu FUNCTIONS --> monitor operations
- --> detector all channels
- --> CAEN monitoring
then from the FUNCTIONS menu
- --> monitor operations
- --> view results
- --> V_mon/I_mon
Finally, from the FILE menu --> save

Change software variables

This operation affects only the values in the hardstatnewsec1( or 2) file

Choose the variables to change from the EDIT menu
- EDIT --> V₀/I_max/V_max/Trip
Click into the PMT cell to be modified
Enter the new value
Click somewhere out the modified cell to set the new value
Save the changes in the hardstatnewsec1(or 2) file
- form FILES menu --> save

Change hardware variables

This operation affect the actual values loaded into the CAEN crate

From the FUNCTIONS menu --> set operations
At this point there are two possible alternatives
- to select detector all channels or,
- to select individual channel

The detector all channels option

FUNCTIONS menu --> set operations
--> detector all channels
--> V0/On/Off/Pon/Poff

To monitor the actual status of the detector

From the FUNCTIONS menu --> monitor operations
--> detector all channels
--> CAEN monitoring, then
again, FUNCTIONS menu --> monitor operations
--> view results
--> V_mon/I_mon status

The individual channel option

From the FUNCTIONS menu --> set operations
--> individual channel
--> V0/On/Off/Pon/Poff

To monitor the actual status of a single channel click on its cell an wait for the result

Notice #1: If you can't run the program try this action:

from clonxx:

telnet croc17
-> reboot

This takes some time.

At the end, the system will close automatically the connection.
So if , after typing reboot and waiting some time, you have the message: Connection close by foreign host
This is normal!

To check if the rebooting action is still in progress give, from another window, the following command:
get_roc_status croc17

You HAVE TO do this step every time after a serial connection (via LAT) is used
to monitor the HV.

Notice #2:

The files hardstanewsec1.dat and hardstanewsec2.dat are in the clas10 machine and in the directory /home/aiaces/hvtk

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