laser test of prototype of cee-tpc
TRANSCRIPT
Laser test of the Prototype of CEE TPC
Fei Lu
Shanghai Institute of Applied Physics,
Chinese Academy of Sciences
The 8th Conference of Chinese Advanced Gaseous Detectors
1.Introduction of CEE-TPC
2.TPC prototype I
3. TPC prototype II
4. Summary and future plan
Outline
CEE-TPC
CSRm冷却储存环
CSRe
SFC
SSC
SFC: 10 AMeV (H.I.), 17~35 MeV (p)SSC: 100 AMeV (H.I.), 110 MeV (p)CSRm: 1000 AMeV (H.I.), 2.8 GeV (p)
RIB
LL
2
RIB
LL
1
CSR‐External‐Target‐Facility Experiment
CEE
Lanzhou HIRFL‐CSR:
ZDC
TPC
Team Leader: Nu Xu,Zhigang Xiao
CEE Conceptual Design
eTOF
MWDC
Si Pixel
iTOF
T0Superconducting Dipole
CEE-TPC
Physics
CEE:
Study the cold and dense nuclear matter:Study the quarkyonic matterHelp to look for the Critical Point
Phase Diagram of QCD : Symmetric Energy:
Study the symmetric energy at ρ0 ~ 3ρ0
CEE-TPC
Charged particles ionize gas inside. Ionized electrons drift toward pad plane.Pad Plane signals give positions and time of arriveal(3D).Momentum from curvature of particle tracks in the magnetic field.Particle type from energy loss and magnetic rigidity
CEE-TPC
Simulation of Particle Identification
TPC working Principle
From MSU
Pad Plane Area 90cm× 100cmPads Number 12000Pads Size 10mm × 8 mmDrift Distance 80 cmGas 90%Ar + 10%CH4
E Field Intensity 200V/cmdE/dx Range Z<=2, π,p,d,t,HeMomentumResolution
5%
Two TrackResolution
3 cm
Multiplicity 200Event Rate 1000Hz
Readout Pad Plane
Side Panels
Cathode Plane Beam Window
Gas Electron Multipliers
GET Electronics
Conceptual Design of CEE‐TPCCEE-TPC
TPC Simulations Geant4 & Kalman Filter
Momentum Resolution:Tracks:
CEE-TPC can meet the requirements in the heavy ion collisions experiment at CSR
by Dr. Song Zhang & He Li
Prototype of CEE‐TPC
Field Cage: 10cm×10cm×10cm; Pads: 64 ch
TPC Prototype I
Electronics: Preamplifer, Shaper, 500M Hz Waveform Digitizer.
Thick GEM: 0.2mm thick, from Dr. Qian Liu @UCAS
Laser TestUV Laser : 266nm,15mJ/pulse, 10Hz
TPC Prototype I
4.8 cm/us
TPC Prototype II Construction of prototype
32S Beam Test at CIAE
Beam 10enA150MeV 32S
Target Au,0.1 mg/cm2
TPC, 30 degree,60cm away,Beam in foil,12um
CIAE det.Zero degree.
TPC pre. Amp.64ch
Si pre. Amp.96ch
VME,(ADC+TDC)
Logic Ele.
Shaper 160ch
HV TPC gas control system ,0.1 atm.
TPC working gas,90% Ar+ 10% CH4
Vacuum system
TPC
Si Strip Det.
TPC Prototype II
TPC Prototype II Laser Test
The drifting velocity of Electrons.
Wen Huang et al., Nucl. Sci. Tech. (2018) 29:41
Gas Control from Limin Duan @ IMP, CAS
Test the prototype at three gas pressure conditions
The correlation between eneryloss and the heat quantity of Laser beam per pules
The average energy resolution : 5.4%
TPC Prototype II Energy Loss Measurement
Equipment from Huirong Qi @ IHEP, CAS
The energy loss dependence onThe voltage applied on GEM
The energy loss along the beam
Need calibration of the gain of the GEM.
TPC Prototype II Energy Loss Measurement
The positon resolution in the X direction for each pad is about 0.2mm, and the positon resolution in the Y direction for each pad is about 0.5mm.
The track of five laserbeams in X-Z plane
TPC Prototype II 3D‐track resolution
The track of two laserbeams in Y-Z plane
Summary and Future Plan
1. We have made a small prototype of TPC for CEE project. The test results meet the requirement in the heavy ion collisions experiment at CSR.
2. More R&D of the TPC and the beam test will be done.
3. We will build a SLEGS‐TPC in the future, to study the photonuclear reactions at Shanghai Synchrotron Radiation Facility.
4. We hope this CAGD collaboration can help us with the detectors and the GET electronics.