Prototype Performance in Prototype Performance in D0 test stand D0 test stand & & fiber intrinsic fiber intrinsic performance with KEK performance with KEK test beam test beam M.Yoshida (Osaka Univ.) M.Yoshida (Osaka Univ.) 2004/8/2 @ Osaka 2004/8/2 @ Osaka
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Prototype Performance in D0 test stand & fiber intrinsic performance with KEK test beam M.Yoshida (Osaka Univ.) 2004/8/2 @ Osaka.
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Prototype Performance in D0 Prototype Performance in D0 test standtest stand
ADC mean (p.e.)ADC mean (p.e.)10.610.6 13.613.6 13.413.4
3D tracking3D tracking(M. Ellis)(M. Ellis)
• hit definition : 2.5 p.e. threshold• tracking in 3D
Light yield (3HF2500ppm)
Typical cosmic-ray event
Most probable~10.5 p.e.
Results of 3D tracking Results of 3D tracking analysisanalysis
Resolution: 442 Resolution: 442 ± 4 (stat) ± 27 (syst) ± 4 (stat) ± 27 (syst) mm Expectation from fibre geometry: 424 – 465 Expectation from fibre geometry: 424 – 465 mm
(single fiber bunch or two fiber bunch)(single fiber bunch or two fiber bunch) Most probable light yield: 10.5 – 11 p.e. Most probable light yield: 10.5 – 11 p.e.
(3HF2500ppm)(3HF2500ppm) Expectation based on D0 experience ~10 p.e.Expectation based on D0 experience ~10 p.e.
Efficiency: (99.7 ± 0.2)%Efficiency: (99.7 ± 0.2)% Poisson expectation for 10 p.e. signal 99.7%Poisson expectation for 10 p.e. signal 99.7%
Dead channels 0.2% (two channels)Dead channels 0.2% (two channels) 0.25% assumed in G4MICE simulation based on 0.25% assumed in G4MICE simulation based on
D0 experienceD0 experience
Purpose of KEK beam testPurpose of KEK beam test Intrinsic performance of 3HF scintillating fiber was measur
ed with KEK test-beam in Apr.-May, 2004. To optimize a concentration of the 1st and 2nd dopant
in 3HF fibers Kuraray SCSF-3HF ; 0.35mm-phi, multi-clad, s-type Fibers to be tested:
Attaching SciFi with MICE conn.Attaching SciFi with MICE conn.
Attached the SciFi and clear fibers with MICE conn.Attached the SciFi and clear fibers with MICE conn. Clear fibers for pmt’s gain calibration Clear fibers for pmt’s gain calibration
Clear fiber (1.05mmΦ)
SciFi (0.35mmΦ): 14fibers
SciFi
Clear fib
Set up (KEK-T553)Set up (KEK-T553) Beam area : KEK-T1 beam line
Dark box
Setup (T553)Setup (T553)
mirrorpmt
SciFi
•SciFi on support structure in the dark room
Light yield with various 3HF Light yield with various 3HF concentrationconcentration
SummarySummary Prototype tracker was constructed in Oct., 2003Prototype tracker was constructed in Oct., 2003
3 stations3 stations VLPC readoutVLPC readout
Light yield of the prototype is measuredLight yield of the prototype is measured 1D & 3D tracking have been carried out. 1D & 3D tracking have been carried out. Light yield in pT1%+3HF5000ppm is found to be less than Light yield in pT1%+3HF5000ppm is found to be less than
pT1%+2500ppmpT1%+2500ppm Beam test was carried out in Apr.-May 2003Beam test was carried out in Apr.-May 2003
Check intrinsic performance of 3HF fiberCheck intrinsic performance of 3HF fiber PTP1%+3HF5000ppm has the best light yield in the data set PTP1%+3HF5000ppm has the best light yield in the data set
w/o waveguide.w/o waveguide. 3HF5000ppm was found to have almost same light yield (4-3HF5000ppm was found to have almost same light yield (4-
5p.e.) as 3HF2500ppm after transmitting in 4m-long 5p.e.) as 3HF2500ppm after transmitting in 4m-long waveguidewaveguide
Discrepancy between the prototype and beam-testDiscrepancy between the prototype and beam-test We should estimate systematic errors in the beam-testWe should estimate systematic errors in the beam-test We will produce an additional station with both 2500ppm and We will produce an additional station with both 2500ppm and
5000ppm for prototype upgrade.5000ppm for prototype upgrade.