TPC BASED IMP. Limin Duan, Gas Detector Group. Institute of Modern Physics, CAS TPC tracker detector technology mini-workshop

Transcription

1 TPC BASED IMP Limin Duan, Gas Detector Group Institute of Modern Physics, CAS Beijing,IHEP TPC tracker detector technology mini-workshop

2 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

3 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

4 Infrastructure 4 Wire winding machine Stretching table mm 3 ultrasonic cleaner Multidimensional moving table Recently, 150 m 2 clean room was built grade

5 GEM-readout TPC 5 Normal press TPC 3D tracking for external target IMP Hz ACTAR TPC Low-energy nuclear experiment:2-body calculation or 3-body tracking of emitted particles 40K Hz Position resolution about 1mm

6 GEM-readout TPC prototype 6 Stand GEM foil (50 um) 2 Layer GEM readout Sensitive area: mm 2 Working gas: 90%Ar+10%CO 2 Drift length: 150 mm pad size: 4 10mm 2 and 2 5 mm 2

7 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

8 Electronics 8 FEE:SFE16 DAQ: 128 channel HPTDC

9 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

10 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.

11 Cosmic ray track 11 Cosmic ray X axis: pad number; Y axis: deposited energy Red area without readout

12 Fired pad multiplicity 12 The efficiency is 98% for cosmic ray. E=130V/cm, HV=1540V.

13 Spatial resolution of the calibration system 13

14 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

15 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

16 Large area (45cmx45cm) GEM detector 16 Pre-Stretching foil assemble Fasten on the frame

17 Gain Gain uniformity test 17 Pad number

18 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

19 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!

20 Prototype for ACTAR TPC 20 Specifications 10 10cm active area PCB(48 channel) Thick 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

21 test result with source mbar Gases: He+CO 2 90:10, P Pu source

22 22 Detector tests with IMP

23 Detector tests with IMP 23 Gases: He+CO 2 90:10, P10 Pressures: 90 mbar, mbar Beam: KHz max AGET electronics (256 channel) 250μm Cu-Be wire Field cage Thick gem Silicon DAQ AGET Data

24 Preliminary results for 16 O+ 40 Ar 24 Elastic/inelastic Fusion

25 Large area MWDC for DAMPE project Effective area: 840mm 840mm 20 %CO %Ar, HV:1650v SFE16+HPTDC

26 Ionization chamber (IC) Multiple sampling IC Transverse view of IC

27 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

28 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 29 Thanks!

30 Achievements Wire detector:mwpc;mwdc; Ion chamber; PPAC; MPGD:GEM;Micromegas;TPC (based GEM readout)