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LAB Cosmic Data
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Data Format

Last modified: 18 October 1998

Where to find the data:
 
$BFROOT/data/data03/dcdata/dch
This is where you can find the data files. Files are named runnnn where nnn is the run number.
The data files are copied to this NFS directory before being written to the tape.
Interesting data are kept here as long as the space allows, while junk runs are erased after copying to the tape.
Tape in the silo
The data are written to a tape in the silo for archiving. The tape can be read from SLAC server machines (e.g. morgan and percheron) using stagein command.

How to stagein:
The easiest and recommended way is:

cd $BFROOT/data/data03/dcdata/dch
revive runXXX

The script revive will send a correct request to the staging system, which will read in the data to a staging disk and create a symbolic link runXXX for you. Don't mind if the link is already there, or if the data itself is there: revive and stagein will (at least should) take care of all the details.

Run Start Date/Time Events HV Threshold Readout/Calibration Status Comments QA plots
1658 6/25/98 20K 2020V 240mV 9 FEAs read out: a full vertical wedge, and three wedges with only two boxes (FEAs 1 and 2) instrumented GOOD   ps file and hot/dead channels
1674 6/28/98 20K 2020V 240mV 9 FEAsread out GOOD possible instabilities in gas composition ps file and hot/dead channels
1678 6/29/98 20K 2020V 240mV 6 FEAs, forming two complete chamber wedges GOOD Warning: Repeated events have been found, most likely present in previous runs as well! ps file and hot/dead channels ChebyCal ChebyCon
1688 7/01/98 7K 2020V 240mV 23 FEAs  read out, forming a complete lower quadrant and nearly complete upper quadrant (one box missing). OK the wire mapping was not correct for the lower quadrant (it appears as a side quadrant). So rather than seeing straight tracks going through all 80 layers, you'll see two tracks with phi differing by pi/2.

One of the trigger 'wires' was noisy, reconstuction uses only one trigger 'wire' but the corresponding TOF correction is still missing; result: degraded resolution

 ps file and hot/dead channels ChebyCal ChebyCon
1690 7/03/98 20K 2020V 240mV 22 FEA's read out, forming a complete lower quadrant and nearly complete upper quadrant (outer two FEAs in wedge with least acceptance are missing   wire mapping should be fixed ChebyCal ChebyCon
1719 7/11/98 40K 2020V 240mV 3 wedges: 4,5,12, which will appear as 3,4,11 Done Half of the events have the bit 0x80000 ("BAD_DATA") set in the event flag, meaning that the online software detected an error in the data format (the offline code needs to be updated to recognize this bit, I think). The "bad" events will have 16 dead channels in the outer FEA of wedge 5 (the wedge that will seem to be wedge 4) ps file hot/dead channels ChebyCal ChebyCon
1731 7/22/98 11K 2020 240 24 FEAS in quadrants 1 and 3. Done Only 2/8 FEAS in superlayer 1 have hits (wedge 7 and 8). There is a hole in wedge 5, superlayer 4. ps file hot/dead channels ChebyCal ChebyCon
1732 7/22/98 11K 2020 240 as above Done as above ps file hot/dead channels ChebyCal ChebyCon
1749 7/23/98 21K 2020 190 as above Done as above ps file hot/dead channels ChebyCal ChebyCon
1764 7/31/98 20K 1960 190 2 quadrants v4 Time of hits in lower quadrant is 80ns late.This prevents tracks being found in lower quadrant. Now corrected for in DchProto ps file hot/dead channels ChebyCal ChebyCon
1791 8/4/98 20K 1960 200 Quads 0 and 2 v4   ps file hot/dead channels ChebyCal ChebyCon
1800 8/5/98 20K 1960 190 Quads 0 and 2 v4 The same layers that are noisey in quads 1 and 3 are noisey in this run. ps file hot/dead channels ChebyCal ChebyCon
1801 8/6/98 40K 1960 200 Quads 0 and 2 v4   ps file hot/dead channels
1804 8/10/98 20K 1960 210 Quads 1 and 3   OEP Format  
1807 8/11/98 ? 1960 200 Quads 0 and 2   Pro2 Format not yet hot/dead channels
1813 8/12/98 40K 1960 200 Quads 1 and 3   Pro2 Format. The center trigger has been used and delayed so that most tracks should be in the rear of the chamber ps file hot/dead channels ChebyCal ChebyCon
1842 8/23/98 50K 1960 200 Quads 0+2, lab38   OEP Format  
1847 8/23/98 50K 1960 200 Quads 0+2, lab38   OEP Format  
1848 8/23/98 ? 1960 200 Quads 1+3, lab42   OEP Format  
1849 8/23/98 53K 1960 200 Quads 0+2, lab38   OEP Format  
1850 8/24/98 100K 2020 200 Quads 0+2, lab38   OEP Format  
1853 8/24/98 500 2020 200 Quads 0+2, lab44   P2 Format, automatic loading of calibration files (but not used by P2 Format data). This run had a memory leak.  
1854 8/24/98 50K 2020 200 Quads 1+3, lab43   As above; memory leak fixed. ps file hot/dead channels ChebyCal ChebyCon
1855 8/24/98 2K 2020 200 Quads 1+3, lab43   As above  
1856 8/24/98 50K 2020 200 Quads 0+2, lab44  

As above

 ps file
1859 8/24/98 5K 2020 200 Quads 1+3, lab46   OEP format; memory leak  
1860 8/24/98 7K 2020 200 Quads 1+3, lab46  

As above

  
1866 8/25/98 55K 2020 200 Quads 0+2, lab45   As above; leak fixed?  
1867 8/25/98 50K 2020 200 Quads 0+2, lab45  

As above; rear trigger

 ps file
1868 8/25/98 50K 2020 200 Quads 1+3, lab46   As above; rear trigger ps file
1869 8/25/98 51K 2020 200 Quads 1+3, lab46  

As above; back to normal trigger

  
1870 8/25/98 49K 2020 200 Quads 0+2, lab45  

As above

  
1876 8/25/98 50K 2020 200 Quads 0+2, lab45  

Rear Trigger

  
1877 8/25/98 28K 2020 200 Quads 1+3, lab48  

Rear Trigger

  
1879 8/25/98 20K 2020 200 Quads 1+3, lab48  

Rear Trigger

  
1886 8/25/98 35K 2020 220 Quads 1+3, lab48  

As above; SL1 guard/zipper wire voltages changed to reflect use of different diameter wires

  
1887 8/25/98 50K 2020 210 Quads 1+3, lab54  

As above

  
1889 8/25/98 50K 1960 200 Quads 0+2, lab53  

As above

  
1892 8/26/98 52K 1960 200 Quads 1+3, lab54  

As above

  
1895 8/26/98 90K 1960 200 Quads 1+3, lab55  

As above; rear trigger

  
1911 8/27/98 50K 2020 220 Quads 0+2, lab67  

Fee2, wedge 9 and Fee3, wedge 5 replaced/repaired; final HV cables in final segmentation; all quads calibrated before run (lab67,lab69)

 ps file
1912 8/27/98 50K 2020 220

Quads 1+3, lab69

  

Rear Trgger

 ps file
1913 8/27/98 50K 2020 210 Quads 0+2, lab67  

As above

  
1917 8/27/98 90K 2020 220 Quads 0+2, lab67  

As above

  
1919 8/27/98 100 2020 200 Quads 1+3, lab69  

As above

  
1920 8/27/98 49K 2020 200 Quads 0+2, lab67  

As above; fmon on

  
1921 8/28/98 50K 2020 240 Quads 0+2, lab102  

Random Trigger

  
1923 8/28/98 50K 2020 200 Quads 1+3, lab101  

Rear Trigger

  
1925 8/28/98 16K 2020 190 Quads 1+3, lab101 v3

As above

 ps file
1926 8/28/98 42K 2080 190 Quads 1+3, lab101 v3

As above

 ps file
1930 8/28/98 43K 1960 190 Quads 0+2, lab110 v4

As above

 ps file
1931 8/28/98 50K 1960 190 Quads 1+3, lab109 v4

As above

 ps file
1932 8/29/98 50K 1960 200 Quads 0+2, lab110 v3

Center Trigger

 ps file
1933 8/29/98 50K 1960 200 Quads 1+3, lab109 v4

Center Trigger

 ps file

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