DAQ System to Search for GRBs using Water Cerenkov Detectors Mario Castillo*, Gonzalo Perez*,...
Preview:
Citation preview
- Slide 1
- DAQ System to Search for GRBs using Water Cerenkov Detectors
Mario Castillo*, Gonzalo Perez*, Humberto Salazar* and L. Villaseor
** * Facultad de Ciencias FisicoMatematicas, BUAP, Puebla **
Institute of Physics and Mathematics, University of Michoacan,
Morelia VII SILAFAE CAB Bariloche, Ar January, 13-21, 2009
- Slide 2
- Slide 3
- WCD array at Sierra Negra to search for GRBs
- Slide 4
- 4550 masl (610 g/cm2)
- Slide 5
- 4m 2 x 1.4 m Single 5 EMI flat PMT Tyvek Ultra pure (~20
microS) water
- Slide 6
- FPGA Xilinx Spartan 2E JTAG 50 Mhz Clock VP or UT Oncore GPS
Receiver 50 ns Antenna 1 PPS Serial 9600 Baud PROM 4 operation
modes: Trace, Charge, Rate, Muon Decay RAM 10 bit ADC board 100-200
MHz|| Schematic of the DAQ Board (one channel upgradable to 3
channels) Languages: VHDL + Perl & AWK RS232 115200 Baud 2x-4x
clock Signal from PMT
- Slide 7
- ADC daugther boards 1 or 2 AD9214BRSZ-105 chips operating at
100MSPS.
- Slide 8
- We use one (two) delay-locked loop (DLL) circuits to obtain 100
(200) Mhz out of 50 MHz
- Slide 9
- Use a Motorola Oncore GPS receiver Use a Motorola Oncore GPS
receiver in precise Timing Mode model UT+ Position-Hold option 1PPS
Cable and antenna Delay Time RAIM option to isolate satellites with
erroneous time measurements
- Slide 10
- Slide 11
- Trace mode, samples 30 trace points every 10 ns in real time
and measures charge, amplitude, baseline and STD
- Slide 12
- Trace Mode: Up to 180 full traces per second Bottle- neck:
115200 baud comm rate
- Slide 13
- Charge mode: Up to 2880 Charge & Amplitude measurements per
second (1920 per s if rise time is also measured)
- Slide 14
- Measure Charge, Amplitude,T10-50,T10-90 with good precision for
three different triggers. Arbitrary muons threshold of 30mV
- Slide 15
- 1.54 m diameter, 1.2 m water, one 8 PMT, tyvek 1/5 in volume of
an Auger WCD
- Slide 16
- Slide 17
- LabView based DAS
- Slide 18
- Slide 19
- Rise time behaves similarly to Charge over amplitude
- Slide 20
- Charge spectrum 2000 masl 4550 masl
- Slide 21
- Muon decay mode: Time between consecutive pulses in a 20
microsec window and time over threshold with granularity of 5
ns
- Slide 22
- Stopping muon at 0.1 VEM Decay electron at 0.17 VEM Crossing
muon at 1.05 VEM Alarcn M. et al., NIM A 420 [1-2], 39-47
(1999).
- Slide 23
- Rate mode: Number of pulses above 4 thresholds every 5 ms
- Slide 24
- Conclusions DAQ system prototype tested 1-3 ADC channels at
100-200 MHz Precise timing from GPS 4 operation modes: Trace,
charge, muon decay and rate To do: implement as a single board