Strip Detectors DST Introduction

The Raw data size is dominated by the readout from the 5120 channels of the silicon telescope. In the DST this is removed and, from the telscope, only the hits are kept. The test detectors keep all their raw data.

This DST is maintained as a GZIP'd HBOOK ntuple, with the following features.

Paw (and comis) enable quick checks to be made rapidly
Transportable 'RZ' format.
Data-compression, storing only those bits needed.
Totally unreadable until GUNZIP'd

This last feature means that the DST has to be gunziped from stage disk to another area before it can be processed. For batch jobs the 'other area' is the batch machine work area, but for interactive acces stracth space is needed.

Accessing the DST

Here is a list of the DST's that have been produced,

First create:

~/public/tb95/paw This is where histogram links will be put.

Interactive access

Stage in the DST tape useing:

~wmurray/public/tb95_dev/bin/dstpaw.run lhnnnn m

A link of the form: ~/public/tb95/paw/lhnnnn.m.dst should be created. Now you can open this file in Paw, and make plots.

Batch mode

Run on a DST tape using:

~wmurray/public/tb95_dev/bin/strpdst.run lhnnnn m

'lhnnnn' is the DST tape, and 'm' is the file sequence number on that tape. The subdetector code should run transparently on DST or raw data. This script does the 'gunzip' for you.

DST reference

The complete definition of the information on the DST can be found here.

Comments to : Bill Murray or mail me .