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S30XL-LESA/LDMX
During your shift, make sure you monitor this screen. If there are windows missing, there are instructions to start these windows below. If the windows are not nicely organized, organize them!
To start up the GUIs for the slow controls, log into clonusr3 as clas12run (ask expert for password).
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"Temperatures" brings up:
The SVT Temps and ECAL Temps bring up:
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Note the "SVT DAQ Heartbeat":
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if this reads "dead", then the values on the GUI are old and
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not updated.
Check if the SVT DAQ
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is still running.
Pay attention as you need to determine the status of the system to avoid damaging temperature to the SVT. If unsure; call the expert.
The Ecal temperatures should be around 70F.
SVT Voltages brings up:
The Alarm Handler brings up:
When there is an alarm this button will be flashing, either yellow or red, and a beeping sound is made. Please read the Alarm section below how to navigate and respond to the alarms.
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To connect to their interfaces, first login into clon10 from a JLab machine with the user name clasrun:
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> ssh clasrun@clon10
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In order to obtain the password, talk to an expert!
At this point, the EPICS GUI is started as follows:
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> medm -x /usr/local/clas/devel/R3.14.12/support/xycomioc-1.0/medm/svt_trips.adl
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Make sure that the box to the right of the OFF/ON buttons are RED.
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You should see currents on DVDD (~250mA) and AVDD(~350mA but sometimes ~500mA). The current on V125 will often be zero until the DAQ has configured the chips. The bias should ramp up and you should see it stopping at 180V.
One special feature is that the DVDD power is coupled between two hybrids (0&1,2&3, and so on). Thus you will see DVDD current of the other hybrid ON even though that hybrid is not "ON". This is expected and normal behavior.
Make sure that the box to the right of the OFF/ON buttons are GREEN.
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You should see all low voltage currents and high voltage bias ramping down.
One special feature is that the DVDD power is coupled between two hybrids (0&1,2&3, and so on). This means that powering down always results in powering down BOTH hybrids. This is expected and normal behavior.
Never do this without explicit instructions from an expert!
Find the GUI for the SVT voltages.
There is a box in the upper right corner "Bias Voltage Setpoints". Input your new bias voltage value and hit Enter. This will propagate this voltage to all SVT modulels.
To turn bias on individually please look at the section below.
To be filled.
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To be filled
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The applied voltages for the low voltage supplies are hard-coded and cannot be changed.
Nominal low voltage currents during normal operations/data taking:
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| Low [mA] | High [mA] |
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DVDD | 230 | 260 |
AVDD | 380 | 420 |
V125 | 260 | 320 |
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WhenHigh voltage should be at 180V during normal operations/data taking.
al range of values for low voltage currents and Changing high voltage bias during normal operation (data taking) is shown in the tables below.
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| Low [mA] | High [mA] | ]]></ac:plain-text-body></ac:structured-macro> |
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DVDD | 230 | 260 | ||
AVDD | 380 | 420 | ||
V125 | 260 | 320 |
values is an expert only action.
In EPICS control gui we can click the button to the right saying "Hybrid x" (x=\[0,9\]) and a new GUI pops up showing more options. Wiki Markup
To set the voltage there are three columns to pay attention to:
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Measured V: measured voltage
Only the bias voltage can be changed; the low voltages are "hard coded".
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This should only be done by expert!
1. Open the hybrid view of the particular hybrid you want to change.
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3.3 You should see your number propagate to the Demand V column (this might take 1min, be patient!).
Two power supplies crates are being used to power the top and bottom volumes of the SVT.
To connect to their interfaces, first login into clon10 from a JLab machine with the user name clasrun:
Code Block |
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> ssh clasrun@clon10
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In order to obtain the password, talk to an expert!
At this point, the EPICS GUI is started as follows:
Code Block |
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> medm -x /usr/local/clas/devel/R3.14.12/support/xycomioc-1.0/medm/svt_trips.adl
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In the case where the operation of the power supplies can not be done through EPICS, each power supply can be accessed directly through a terminal. After login into clon10 (see above), the command
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Half_Module_Assignments-Power_Supply_Assignments.pdf
Updated with switched connectors:
half-module assignments - Power supply assignments updated.pdf