Mott Analysis

Data Files

 CODA writes the data to this disk: /data/mott

Analyze a run

 In the directory: /work/idaq/Mott/Analysis/decoder/
 Type: decode.pl RunNumber

Analysis Macros

There are several macros to be used for the analysis. All are in opsmdaq0 in the directory:

 /work/idaq/Mott/Analysis/macro/

To plot the Mott FADC Pedestals:
[102] idaq@opsmdaq0 > root
root [0] .L FADC_Ped.C
root [1] FADC_Ped t
Enter Run Number: 
7154
root [2] t.Loop()

To calculate Mott Asymmetries:
[102] idaq@opsmdaq0 > root
root [0]  .L MottAsym.C
root [1]  MottAsym t
Enter Run Number: 
7154
root [2] t.Loop()

Backup CODA Data Files to SILO

Cron scripts are installed on the idaq account on opsmdaq0 to back up data and delete it from /data and /data1:

/opt/idaq/cron/cron_opsmdaq0

Do not attempted to copy, delete, move, or rename files. Never !

The scripts assume that data appears in /data*/DIR where DIR = "annihilation" or "compton" or "mott" Files must have the keywords "PEPPo" or "Scalers" or at least "dat". This avoids writing scratch files like root output. Do not start putting data in some new place or with new names. It won't be backed up to MSS if you do that.

The data are deleted from local disks if they have been written in duplicate with correct byte count to the MSS tape silo. The data stay on disk for an amount of time that is related to the amount of disk space is available. If lots of disk available, the data stay forever. If not much disk, the data are deleted aggressively.

 The data is copied to: /mss/accel/peppo/raw

Issues and FAQ

• RunNumber: if the in the msql is different from the one in cool database, coda doesn't work. To solve it open dbedit => localhost => sessions and change the RunNumber