Transcript RPC (Resistive Plate Chamber)

RPC
(Resistive Plate Chamber)
Dina Ali Amer
SUP. Gdovatjuk V.M
What is RPC?
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Resistive Plate Chambers (RPCs) are gaseous parallel plate
avalanche detectors with time resolutions down to 50 ps, making
them attractive for trigger and Time-Of-Flight applications in some
cases covering large areas up to a few thousand square meters.
Advantages
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Compared to other technologies are the
robustness and simplicity of construction.
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They are also well adapted to inexpensive
industrial production.
Mode of operation
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RPCs were originally operated in streamer
mode providing large signals, which simplifies
read out electronics and satisfied gap
uniformity requirements.
However, high rate applications and detector
aging issues made the operation in
avalanche mode more popular.
fundamental processes

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A charged particle leaves free
charge carriers in the gas,
which are drifted towards the
anode and multiplied through
an appropriate electric field.
The high voltage that is
applied to the parallel plate
electrodes leads to a uniform
electric field in the gas gap.
The propagation of the
growing number of charges
induces a signal on a read out
electrode.
RPC Testing
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(1)
(2)
(3)
(4)
There are 4 main tests for RPC :
Vacuum test → Pump constant pressure gas , and
monitoring the change in the pressure which must
be limited.
Spacer test → To be sure that the gas width is
constant through all the chamber.
Leakage Current test → Apply high voltage and
measure the leakage current which must be limited
because of the high resistance of the insulator.
Electronic Test →To check all the set up , put all the
set up, Put the RPC between two scintillator detector
and use cosmic ray
Project title
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Charged Particles Detection →
TOF Experiment →
RPC Testing →
Characterizing of pulse time.
Project Aim and Field Of research
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Project Aim :RPC testing till the accelerator
be in operation to do (TOF) experiment.
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Field Of research: TOF in Fundamental High
Energy Physics.
Description of Equipment (1)
Description of Equipment (2)
Description of Experiment
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The main aim of this experiment is to study
the electric pulse characteristics of the RPC
detector →And this may achieved by
changing the gap size OR gas mixture OR
gas pressure.
In Our Experiment : this aim is achieved by
changing the gas gap.
The results:
These is a typical charge spectra, received at 12 kV applied
voltage
This curve shows the dependence of time resolution vs
applied voltage