NDOS pages

General DCS Information

Notes for Shifter

Power Outage Recovery

List of Tasks last updated 03/11/13

Expert DCS Information

On-Call Schedule

DCS Machines at the LCC

for the physical location and naming of these machines see here: NDOS-DCS-PCs

(for FD see here for DCS_machines and DCS_NET.)
User: novadcs

In order for the DCS MySQL database to be visible to CSS from the readout machines, you have to set up the tunnel as follows:

ssh -f novadcs-ctrl-master -L 3906:localhost:3906 -N


Denis set up a chron job to back up the last ten days. The backups can be found in:


Here is the script that controls all of the backups:



Instructions for Starting CSS Applications

Instructions for Starting ACNET Applications

APD Temperatures

Reconfiguration Steps

Using the DCS configuration editor GUI (New!)
Changing the DCS FEB enable masks
Changing an APD temperature setpoint
Changing warm or cold HVadjust values


Current Method

  • If the FEB is masked from the run or is otherwise dysfunctional, we label it as "INACTIVE" (grey).
  • If the APD temperature ($(FEB)_tecc) is below -61.0C, we label it as "NO-TEC" (grey).
  • If the APD is not set to be cooled ($(FEB)_enable.RVAL = 0)
    • and the FEB Temperature goes into alarm (see table below), we color it red, otherwise it's dark green.
  • If the APD is set to be cooled ($(FEB)_enable.RVAL = 1)
    • and any of the PVs go into alarm (see table below), we color it red, otherwise it's green.
Process Variable (PV) Low Alarm Threshold High Alarm Threshold
APD Temperature -17 C -13 C
TEC Drive Current 10% 90%
FEB Temperature 15 C 45 C

The alarm thresholds are set at the IOC level in source:epics/dcmIOCApp/Db/febs.db


Here are a few requests for alarming:
  1. Mat noticed that one APD was at room temperature (27C), which indicated a disconnection from the cooling water system (15C). He requested that we alarm on such APDs.
  2. Jon requested that the detector overview shows the number of alarms for each FEB.


The quantities that we monitor with the APD Temperature Monitor originate from Analog to Digital Converters (ADCs) and are read out as raw ADC counts. We then convert these raw counts to physically meaningful quantities such as temperature or voltage. The attached Mathematica Notebook is a convenient tool to convert one quantity to another (the PDF file is a snapshot in case you cannot look at a Mathematica Notebook). It currently only contains conversions for APD Temperatures and HV Adjust values. More detail can be found on this page: Temperature Conversion.

Process Variables (PVs)

Monitoring PVs

Detector Temperature Monitor Discussion