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Beam Test of BGO Crystal
Yunlong Zhang 2009.12.8
CSR
RIBLL
Test counter here
The configuration of beam elements and test counter
beam
TofT2-Si BGO counter
In order to extend the dynamic range of readout, we use multi-readout from the dynodes.
10k 10k10k 10k
300k 300k 300k 300k
Dy8 Dy9 Dy10 A
1R=300K, I=0.256mA at HV=1000V; 0.256W power dissipation
Readout of PMT
Data collection
Ady10Dy9dy8
Enengy signals
Time signals ACFD GG
A
dy8
Peak ADC
22Na gamma calibration:
CAEN568LC
Philip7164
The spectrum of 22Na under -1100V.
1000V Na22
1100V Na22
Fit function:
proton kinetic enengies(MeV)
(Bρ)D3=(Bρ)D4 Tm
expected
(Bρ)D3=(Bρ)D4 Tm
experiment sets
10 0.4399 0.4399
12 0.5043 0.5044
14 0.5450 0.5452
16 0.5829 0.5827
18 0.61858 0.6186
20 0.6524 0.6526
24 0.7154 0.7156
28 0.7735 0.7738
32 0.8278 0.8283
mixtue beam 1.6232 1.6625
Beam particles selection
Test with proton beam
Ady10Dy9dy8
Enengy signals
Time signals ACFD GG
A
dy8
Peak ADC
T2-SI
ORT142
ORT450
CAEN568LC
ORTlogic
enengy signals to Peak ADC
Philip744
Philip7164
Delta E vs E
Tp=14MeV
Without Si-∆E correction
T2-Si 280μm
7μm-Al foil
TOF
10μm
T2-Si 280μm
7μm-Al foil
With T2-Si ∆E correction
We have to understand why the ratio between the -odes is energydependence?
T2-Si 280μm
7μm-Al foil
TOF
10μm
Fit function:Fit function:
L = a+b*x
Saturation of fluorescence?
Thanks