Latest revision as of 12:54, 21 October 2021

THIS IS THE OLD/DEPRECATED SBS SHIFT HOW-to PAGE!!!

To access the new wiki page, follow this link to the new how-to page

Overview

This page gives instructions for various aspects of the experiment relating to each of the major subsystems and shift tasks.

Shift Roles

Shift Leader: Executes the Run Plan according to the Run Coordinator's instructions
Target Operator: Monitors the target system
Data Quality Monitor: Starts and stops CODA DAQ runs and monitors the quality of the data that is being recorded

Reporting and Logging

All shift takers should regularly log shift details in HALOG - the Hall A electronic logbook.

Shift leaders should fill out Beam Time Accounting (BTA) information during the shift.

BTA steps

Taking Data

Using the CODA DAQ
- GUI Description
- Starting a Run
- Stopping a Run

Monitoring the data
Online analysis
Shift checklist

Analyzing the Data

This section contains instructions for running the replay script with all detectors on a-onl@aonlX.

Instruction for shift crew

Login to a-onl@aonlX (X=1, 2, 3, 4)
once logged in, type gosbs => this takes you to the directory where the analysis should be done, and sets up the correct environment variables.
type ./run_gmn_50k.sh runnum with
- runnum (integer) the run number you want to analyze;
This analyses the first 50000 events and produces plots that need to be checked.
Please review all produced plots of each GUI, and click on "Exit GUI", this will pop the next GUI.
After you're reviewed all plots, they will be saved as PDFs.

Instructions for full replay to be updated After a run is completed, you may run ./run_gmn_all runnum firstseg nseg with:
- runnum having the same definition as above;
- firstseg being the first segment to analyze;
- nseg the number of segments to analyze.

Specific instructions for experts

Note: these instructions are likely to evolve in a very near future

Login to a-onl@aonlX (X=1, 2, 3, 4)
once logged in, type gosbs => this takes you to the directory where the analysis should be done, and sets up the correct environment variables.
open the analyzer by typing analyzer
once in the analyzer type .L replay_gmn.C+
type replay_gmn(runnum, nevents, firstevent, file_prefix, firstsplit, nsplits, pedestalmode) with:
- runnum (integer) the run number you want to analyze;
- nevents (long integer) the number of events you want to analyze.
- firstevent (long integer) the event number from which you want to start the analysis;
- file_prefix (char*)the prefix of the file you want to analyze;
- firstsplit (integer) the split/segment number at which you want to start the analysis;
- nsplits (integer) the number of splits/segments you want to analyze
- pedestalmode (integer) turn pedestal mode on or off for the GEMs

Recovery Procedures

Systems

High Voltage

SBS EPICS

Alarms

Beam Line

Monitoring the Beam Line
Hall A beam line drawing (to be updated)
SBS checkout procedure
SBS spot++ (beam size verification)
SBS BPM calibration
SBS HARP scan
SBS Polarization Measurements
- Compton: Not Used
- SBS Moller

Target

Magnets

EDTM

How to Set EDTM Frequency with the DVCS Pulser

Detectors

BigBite

GEMs
GRINCH
- Grinch Gas Panel Camera
Timing Hodoscope
Preshower and Shower
- How to adjust discriminator threshold on HCAL DAC
- How to run the scalers script to monitor trigger sum scalers

Super BigBite

GEMs
HCAL
- HCal Overview

@@ Line 1: / Line 1: @@
+<big><span style="color:red"> '''''THIS IS THE OLD/DEPRECATED SBS SHIFT HOW-to PAGE!!!''''' </span></big>
+''' To access the new wiki page, follow this [https://sbs.jlab.org/wiki/index.php/HOW_TOs link to the new how-to page]'''
 = Overview =
@@ Line 27: / Line 31: @@
 * Shift checklist
-== online analysis==
+== Analyzing the Data ==
 This section contains instructions for running the replay script with all detectors on a-onl@aonlX.
 === Instruction for shift crew ===
-'''''Note''': these instructions are likely to evolve in a very near future''
 * Login to a-onl@aonlX (X=1, 2, 3, 4)
 * once logged in, type ''gosbs'' => this takes you to the directory where the analysis should be done, and sets up the correct environment variables.
-* type ''./run_gmn.sh runnum nevents'' with
+* type ''./run_gmn_50k.sh runnum'' with
 ** ''runnum'' (integer) the run number you want to analyze;
-** ''nevents'' (long integer) the number of events you want to analyze.
+* This analyses the first 50000 events and produces plots that need to be checked.
-* note: in a very near future, we might even fix the number of events
+* Please review all produced plots of each GUI, and click on "Exit GUI", this will pop the next GUI.
+* After you're reviewed all plots, they will be saved as PDFs.
+* '''Instructions for full replay to be updated''' After a run is completed, you may run ''./run_gmn_all runnum firstseg nseg'' with:
+** ''runnum'' having the same definition as above;
+** ''firstseg'' being the first segment to analyze;
+** ''nseg'' the number of segments to analyze.
 === Specific instructions for experts ===
@@ Line 88: / Line 97: @@
 * [[Corrector Magnets]]
 * [[LHRS for GMn]]
+== EDTM ==
+*[[How to Set EDTM Frequency with the DVCS Pulser]]
 == Detectors ==
@@ Line 95: / Line 107: @@
 * GEMs
 * GRINCH
+** [[Grinch Gas Panel Camera]]
 * Timing Hodoscope
 * Preshower and Shower
 **[[How to adjust discriminator threshold on HCAL DAC]]
 **[[How to run the scalers script to monitor trigger sum scalers]]
 === Super BigBite ===
 * GEMs
 * HCAL
+**[[HCal Overview]]

Difference between revisions of "Shift How-To"