TPC BASED GEM @ IMP Limin Duan, Gas Detector Group Institute of Modern Physics, CAS 2016.09.01 Beijing,IHEP TPC tracker detector technology mini-workshop
Outline 2 Gas detector group GEM-readout TPC a small prototype Large area GEM-readout TPC status ACTAR TPC Other gaseous detectors Summary and outlook
Gaseous detector group at IMP 3 Team: 1 Researcher, + 3 associated researchers, + students Develop the Gaseous detectors External target experiment Nuclear Physics experiment Beam monitoring detector
Infrastructure 4 Wire winding machine Stretching table 1200 1200 400mm 3 ultrasonic cleaner Multidimensional moving table Recently, 150 m 2 clean room was built 10000 grade
GEM-readout TPC 5 Normal press TPC 3D tracking for external target experiment @ IMP Electronics:SFE16+HPTDC @4K Hz ACTAR TPC Low-energy nuclear experiment:2-body calculation or 3-body tracking of emitted particles Electronics:AGET @ 40K Hz Position resolution about 1mm
GEM-readout TPC prototype 6 Stand GEM foil (50 um) 2 Layer GEM readout Sensitive area: 100 100 mm 2 Working gas: 90%Ar+10%CO 2 Drift length: 150 mm pad size: 4 10mm 2 and 2 5 mm 2
Readout PCB plant 7 Test region Pad size: 2 5 mm 2,4 10 mm 2 6 rows 16 pads, Pad size: 2 5 mm 2
Electronics 8 FEE:SFE16 DAQ: 128 channel HPTDC
5.9 kev X-ray TOT energy spectra 9 Left: Without fired pad cut; right: using cut (n=1) E=83.5v/cm, HV=1370V Drift length=100mm Drift length=50mm
Cosmic ray calibration system 10 2#MWPC 1#MWPC TPC 3#MWPC Cosmic ray was measured by 3 MWPC. The MWPC s sensitive area is 80mm*80mm Start signal :plastic scintillator detector with 150mm*150mm area placed under 3rd MWPC.
Cosmic ray track 11 Cosmic ray X axis: pad number; Y axis: deposited energy Red area without readout
Fired pad multiplicity 12 The efficiency is 98% for cosmic ray. E=130V/cm, HV=1540V.
Spatial resolution of the calibration system 13
Z-direction resolution 14 Drift length was given by MWPC,and Drift-time was given by TPC pad. Pad size 2 5mm 2, E=130V/cm, HV=1570 Known problems: Field cage spark Electric field distortion
Beam Test 15 Beam MWPC TPC PMT IMP, CSR,~ 400 MeV, 40 Ar Problem:No accurate reference time 1 条径迹 2 条径迹 3 条径迹
Large area (45cmx45cm) GEM detector 16 Pre-Stretching foil assemble Fasten on the frame
Gain Gain uniformity test 17 Pad number
Test for ACTAR TPC 18 ACTAR-TPC: a new active target time projection chamber for radioactive beam experiments Gas is both the detector and the target Energy loss like a thin target = excellent resolution Very high effective thickness
ACTAR TPC 19 significant advantages 4π measurement,low energy particle High Detection Efficiency High angular/position resolution 3-D tracking Physics programs: One and two nucleon transfer reactions Rare and exotic nuclear decay (2p, β2p, ) Inelastic scattering and giant resonances Resonant scattering and astrophysics Transfer-induced fission, and more!
Prototype for ACTAR TPC 20 Specifications Design @IMP 10 10cm active area PCB(48 channel) Thick GEM@ UCAS Thick GEM Drift Region:250μm Cu-Be wire 48 channel PCB prototypes Electronics:AGET Objective: Helium burning process in astrophysics 250μm Cu-Be wire
test result with source 21 200mbar Gases: He+CO 2 90:10, P10 239 Pu source
22 Detector tests with beam @ IMP
Detector tests with beam @ IMP 23 Gases: He+CO 2 90:10, P10 Pressures: 90 mbar,50---100mbar Beam: 16 O,114MeV, @ 40 KHz max AGET electronics (256 channel) 250μm Cu-Be wire Field cage Thick gem Silicon DAQ AGET Data
Preliminary results for 16 O+ 40 Ar 24 Elastic/inelastic Fusion
Large area MWDC for DAMPE project Effective area: 840mm 840mm 20 %CO2 + 80 %Ar, HV:1650v SFE16+HPTDC
Ionization chamber (IC) Multiple sampling IC Transverse view of IC
Gas detector using for the heavy ions therapy at IMP 1. Striping ion chamber:monitoring and feedback of the relative dose distribution on the beam ; 2. High energy beam line monitoring gas detector :monitoring the shape and dose of the beam line after the synchronous ring ; 3. Dose IC:for beam dose measurement and feedback in the heavy ions therapy at IMP ; striping ion chamber Dose IC monitoring gas detector
Summary 28 All kinds of wire chamber can be produced A small GEM readout TPC prototype was made and tested Assemble technique of large area GEM detector was studied ACTAR TPC was studied Other MPGD detector developments are in progress
29 Thanks!
Achievements Wire detector:mwpc;mwdc; Ion chamber; PPAC; MPGD:GEM;Micromegas;TPC (based GEM readout)