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The HADES RPC Cosmic Ray Telescope:
        Preliminary Analysis

                Pablo Cabanelas
         Laboratorio Car...
OUTLINE:
●   Overview of the HADES RPC ToF Wall
●   The Cosmic Ray Commissioning
●   Close to the first TRASGO
●   Prelimi...
RPC
The HADES RPC ToF Wall

Consist on 1122 shielded 4-gap timing RPC cells
(0.280mm/gap), covering about 8m2, distributed lik...
The RPC Commissioning
           From April 2009 to nowadays


1. The 6 sectors were instrumented by pairs at the
GSI and ...
Hit distribution of cosmic rays over the 6 RPC sectors
Cosmic ray commissioning summary:


 ●   6 RPC sectors fully instrumented, tested,
 validated and mounted in HADES
 ●   Ab...
Preliminary Cosmic Ray Analysis with TimTrack
Proyecto


               timtrack
            timtrack
             timtrac...
TimTrack:     L
  x




                              z




       X’        V

X0          T0

      Vz
z=0              ...
Preliminary Cosmic Ray Analysis with TimTrack


Analyzed events crossing
one set of four RPC cells



                 ~42...
Preliminary Cosmic Ray Analysis with TimTrack

           Some Ultra-Preliminary Results!!!

                             ...
Preliminary Cosmic Ray Analysis with TimTrack
      Some Ultra-Preliminary Results!!!


                         ~6-8 ns

...
Close to the first TRASGO ??
 2 HADES RPC sectors:
                                                 TRASGO:
Four planes of...
P Cabanelas  Hades Telescope
P Cabanelas  Hades Telescope
P Cabanelas  Hades Telescope
P Cabanelas  Hades Telescope
P Cabanelas  Hades Telescope
P Cabanelas  Hades Telescope
P Cabanelas  Hades Telescope
P Cabanelas  Hades Telescope
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P Cabanelas Hades Telescope

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Transcript of "P Cabanelas Hades Telescope"

  1. 1. The HADES RPC Cosmic Ray Telescope: Preliminary Analysis Pablo Cabanelas Laboratorio Carmen Fernández, USC Proyecto 2nd Workshop, Compostela, February 2010
  2. 2. OUTLINE: ● Overview of the HADES RPC ToF Wall ● The Cosmic Ray Commissioning ● Close to the first TRASGO ● Preliminary Analysis Results
  3. 3. RPC
  4. 4. The HADES RPC ToF Wall Consist on 1122 shielded 4-gap timing RPC cells (0.280mm/gap), covering about 8m2, distributed like this: ● 6 almost-identical sectors ● 2 RPC layers per sector ● 3 columns of RPC cells per layer ● 31 RPC cells per column
  5. 5. The RPC Commissioning From April 2009 to nowadays 1. The 6 sectors were instrumented by pairs at the GSI and placed at horizontal position. 2. Cosmic Ray test was performed with such a setup. 3. At the end, they were mounted on their nominal position in HADES. 4. Currently, they are just there, a bit bored, waiting for a beam to take data.
  6. 6. Hit distribution of cosmic rays over the 6 RPC sectors
  7. 7. Cosmic ray commissioning summary: ● 6 RPC sectors fully instrumented, tested, validated and mounted in HADES ● About 50 days of data taken at a rate of 200 Hz over a pair of sectors ● 895 Gb of data stored ● 1122 RPC cells operative as well as 2243 channels (all but one!)
  8. 8. Preliminary Cosmic Ray Analysis with TimTrack Proyecto timtrack timtrack timtrack timtrack timtrack A Tracking Algorithm for timtrack TRASGOS timtrack Already introduced timtrack timtrack To be presented by timtrack J.Garzón ttrack tim imtrack
  9. 9. TimTrack: L x z X’ V X0 T0 Vz z=0 Y’ Y0 y
  10. 10. Preliminary Cosmic Ray Analysis with TimTrack Analyzed events crossing one set of four RPC cells ~42cm ~5cm 33cm Ref Plane Z X
  11. 11. Preliminary Cosmic Ray Analysis with TimTrack Some Ultra-Preliminary Results!!! Reconstructed X at the reference plane Reconstructed X vs X' (slope): acceptance
  12. 12. Preliminary Cosmic Ray Analysis with TimTrack Some Ultra-Preliminary Results!!! ~6-8 ns Two-Peak structure Reconstructed T0 (Time at the reference plane) in ps [Not calibrated]
  13. 13. Close to the first TRASGO ?? 2 HADES RPC sectors: TRASGO: Four planes of shielded 4- Several planes (4 at least) gap RPCs of ?-gap RPC strips Different Geometry -- Same FEE, DAQ and Analysis
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