The High Voltage System Program (HVS)
is used for controlling
and monitoring the high voltage mainframes, of the type LeCroy-1458,
network using TCP/IP protocol (if an Ethernet interface is installed in the mainframe)
or telnet protocol (if a portserver
is connected to the mainframe's serial interface, which is usually the case).
This program has a GUI (Main Window) to control
and setup various mainframes' parameters by the user. It also runs a
server to process external control requests. So, the user
can do monitoring and updating of the mainframe parameters
by using either the GUI window or the remote interface.
The program is located on adaql?, account adev (home directory /adaqfs/home/adev), in the following subdirectory:
slowc/ HV_BB/ - BigBite HV files HV_NA/ - Neutron Arm HV files hvg/ - Java code and the server code reset/ - tools to reset the crates scripts/ - various scripts (HV adjustments, external monitoring etc.)
HVframes.conf - contains the list of mainframes used for this detector HVmaps.conf - contains references to geometrical maps of the detector hv_log/ - log files hv_maps/ - files with the geometrical maps of the detector hv_set/ - files with the detector HV (and other) settings
slogin adaql5 -l adev - login to one of adaq machines hvs HV_BB - start the task for BigBite slogin adaql6 -l adev - login to one of adaq machines hvs HV_NA - start the task for Neutron Arm
After the mainframes have been identified, a GUI window appears with a menu and an initialization bar. The mainframes (crates) are defined by their access points through portservers, as genps1:2001. A mainframe (say, genps1:2001 for example) or several of them may fail to connect because the portserver has not released the line to this mainframe. One may check this by:
telnet genps1 2001 - try to connect (use the proper numbers) - if it fails, do: telnet genps1 - enter as root (see ~adaq/doc/portserver.doc) who - check the connection kill 1 - kill the connection to port 1 (2001) or whatever port is needed quit - leave the connection to the portserver
If initialization of all high voltage mainframes (in 1-2min) is completed successfully, a tabbed panels with names of all connected mainframes will appear in the window: One may select a mainframe using the upper tabbed panel, then a module (slot) using the next tabbed panel. The values of the module properties are presented as a table in the selected module tab. Those shown in blue color can be changed by the user. Additionally, one may turn on/off the selected crate, using the buttons at the left side of the panel. Also, one may turn on/off groups of channels (all of them, or the selected crate, or the selected module) using the meny Edit>Enable Channels and Disable Channels
Save Voltage Set - Store only the demanded HV values Save All Settings - Store all the appropriate values
edit or type in a new file name and hit Save.
Loading a file with settings is similar, by using the File ->Load Settings menu. The time to update the mainframes depends on the number of channels to change.
BB_SH - BigBite shower detector BB_PS_L - BigBite preshower detector, Left BB_PS_R - BigBite preshower detector, Right BB_SC_L - BigBite scintillator detector, Left BB_SC_R - BigBite scintillator detector, Right BB_DC - BigBite Drift Chambers NA_ND_L - Neutron Arm neutron detector, Left NA_ND_R - Neutron Arm neutron detector, Right NA_VT_L - Neutron Arm veto detector, Left NA_VT_R - Neutron Arm veto detector, Right NA_PO - 4 positioning (vertical) counters
A green ball indicates than the channel is ON. Using the Map menu one can display various parameters, for example the measured voltage (see the right picture). To find out what channel in the main program window corresponds to the channel in the map window one can double click on the channel in the map window. A window with the selected channel information pops up.
Additionally, in the main window the corresponding crate and module are selected, and the channel is highlighted. To close window with channel information press "OK" button.
3 5 1.2 5 21 0.85
hv_adj.com BB_SH adj.dat
hv_proc.com -D NA -c MAPS - for Neutron Arm hv_proc.com -D BB -c MAPS - for BigBite
hv_proc.com -D NA_ND_L -m 1:7,1:27 -c GET -P MC
When the progrem starts, it tries to connect to the crates listed. If some can not be connected, the program reports it and happily continues with fewer crates. One should see how many are really attached (should be 2 for BB and 4 for NA). Fixing the problems is explained here.
One of the most common problems occurring when the beam is on, is tripping of a crate, presumably because of radiation. The crate typically loses connection and sometimes also turns HV off. A flashing alarm panel appears on the screen along with a sound alarm (a "harp" sound). Again, typically, connection is automatically re-established in a minute or so, and the program starts to read the values from the crate again. One should click on the alarm panel. Next, one should look what is printed at the bottom of the main GUI panel. Here is an example: The program reported that it reopened connection to crate 1, but that it found the HV off - and not from GUI operations. Also, the last slot shows 0 voltages and currents. One should try to turn HV on (clicking on ON button at the left). If the voltage starts rising (it actually starts with the 1-st slot), most likely no other intervention is needed. Sometimes it happens that the GUI reports HV off, but shows non-zero measured voltages, probably stale ones, in the slots. Then, it is better to restart the GUI.
There are two different types of crate resets. The most powerful one is to cycle the crate power. All the VME crates and the slow control crate genslo1 are connected to this system, described here. The second type of resets is explained in this document.
Resetting of sevreral GeN crates is performed by using a 64 channels relay board VMIVME2210 installed in a VME crate with a hostname genslo1. There is a reset patch panel with output connectors labeled from 0 to 16 installed above this crate in the RR7 rack. The connector number corresponds to the relay board channel number, which has normal-open-contacts.
The reset inputs of the crates are connected to the patch panel.
A high voltage or a VME crate is reset when the corresponding
relay closes its contacts. For FASTBUS crates there are special
output connectors on the
patch panel labeled as <>#15 and #16
providing the NIM level of output signals on them for reseting.
Table 1 shows the mapping between the crate name and relay board
|Description||Crate Name||Reset channel number||connected?|
|Neutron Arm (NA)|
Voltage Crate hv1
|NA High Voltage Crate hv2||genps1:2002
|NA High Voltage Crate hv3||hatsv22:2002
|NA High Voltage Crate hv4||genps1:2004
|NA High Voltage Crate Spare||genps1:2003
||no||BigBite Arm (BB)
Voltage Crate hv5
|BB High Voltage Crate hv6||genps2:2002
|BB Fastbus Crate||bbsfi1||15
|BB Fastbus Crate||bbsfi2||13
|BB Fastbus Crate||bbsfi3||14
In order to reset a crate from GUI one should use a terninal window on adev@adaql? to type:
The GUI window has three groups of the buttons, marked with the crate names. In order to reset a crate one should click on corresponded button and confirm this operation in the next window. Resetting takes 2-3sec.
The configuration data for GUI buttons and channel numbers are stored in a text file ~/slopc/reset/dat/reset.data, defined in the gen-reset (rbs) script.
The format of this file is clearly seen from the example considered:
[Neutron Arm Crates] VME_CPU (genvme1) 5 FASTBUS_CPU (gensfi1) 16 [BigBite Crates] FASTBUS_CPU (bbsfi1) 15 FASTBUS_CPU (bbsfi2) 13 FASTBUS_CPU (bbsfi3) 14 [High Voltage Crates] NA_HV_Frame hv01 (genps1:2001) 1 NA_HV_Frame hv02 (genps1:2002) 2 NA_HV_Frame hv03 (hatsv22:2002) 3 NA_HV_Frame hv04 (genps1:2004) 4 BB_HV_Frame hv05 (genps2:2001) 6 BB_HV_Frame hv06 (genps2:2002) 7
In order to reset a crate from command line one should use a terninal window on adev@adaql? to type:
genps1:2001 1 genps1:2002 2 hatsv22:2002 3 genps1:2004 4 genvme1 5 gensfi1 16 gensfi2 13 gensfi3 14 genps2:2001 6 genps2:2002 7 bbsfi1 15
gen-clreset genvme1 - reset the NA VME crate gen-clreset genslo1:2001 - reset the 1-st HV crate for NA
The DAC accepts input values in a range of 0 - 4095 and generates the output voltage in a range of -10V - +10V (0 V for 2048 input). The resolution of the DAC is 5mV. The way to read/write into the DAC is to use a command cnaf from CODA. The output of the DAC is attenuated by a factor of 10 and combined with an external offset of -5 - -10 mV and distributed to:
|# channel||# detector|
|0||Neutron Detector sums|
In order to read the threshold voltage one should use a terninal window on adev@adaql? to type:
gen-threshold get 0 - - For Neutron Detector
In order to set a threshold voltage to -50 mV one should use a terninal window on adev@adaql? to type:
gen-threshold set 0 -50 - - For Neutron Detector gen-threshold set 1 -50 - - For BigBite
genps1 - Neutron Arm genps2 - Big Bite
|Neutron Arm genps1
High Voltage Frame hv1
High Voltage Frame hv2
High Voltage Frame Spare
High Voltage Frame hv4
Slow Control VME Crate (2700) genslo1
VME Crate (TDC) (5100) genvme1
Fastbus Crate (ADC) (5100) gensfi1
|Neutron arm hatsv22
High Voltage Frame hv3
|BigBite Arm genps2
High Voltage Frame hv5
High Voltage Frame hv6
FASTBUS Crate for DC bbsfi3
FASTBUS Crate for DC bbsfi4
VME Crate TriggerSupervisor/Scalers (5100) bbts1
Fastbus Crate (ADCs) (2306) bbsfi1
VME Crate (ADCs/TDCs) (5100) bbvme1
||configured for terminal||genps2 2008|
The DAQ portserver map is also documented here.
To make telnet connection to the selected crate one can type
telnet genps1 2002 - connect to HV crate #2 of Neutron Arm - if it fails, do: telnet genps1 - enter as root (see ~adaq/doc/portserver.doc) who - check the connections kill tty=2 - kill the connection to port 2 (2002) or whatever port is needed quit - leave the connection to the portserver
IP: 18.104.22.168 - genslo1 IP host: 22.214.171.124 - adaql1 gateway: 126.96.36.199 boot file: /adaql1:/adaqfs/home/adev/vxworks/vx2700-128MB host user: adev script to load: /adaqfs/home/adev/vxworks/genslo1.boot