Marseille – January 17 th, TPCs for High Energy Physics David Attié Max Chefdeville,Paul Colas, Arnaud Giganon, Marco Zito, Ioannis Giomataris, François Pierre, Jin Li, Yulan Li, Huirong Qi, Zhenwei Yang CPPM Marseille 17 January 2008

Marseille – January 17 th, Overview Introduction The LC-TPC R&D Collaboration Saclay-Tsinghua University  TPCs R&D for HEP collaboration Saclay & Lanzhou interests Conclusion

Marseille – January 17 th, Micromegas & GEMs (MPGD) 50 µm 40 kV/cm ~1000 µm 1 kV/cm GEM 2- or 3- stage amplification easy operation low field above the electronics low discharge probability ~50 µm 80 kV/cm Micromegas simplicity single stage of amplification natural ion feedback suppression discharges non destructive Technology choice for Linear Collider TPC: Micro Pattern Gaseous Detector more robust than wires easier to manufacture No E×B effect better ageing properties

Marseille – January 17 th, ILC Detector Concept Studies SiDLDCGLD4-th TrackerSi-strip TPC + Si-strip TPC + Si-strip TPC or DC Calorimeter PFA R in =1.27m PFA R in =1.6m PFA R in =2.1m Compensating R in =1.5m B5T4T3T 3.5T No return yoke BR CAL Tm Tm Tm 2 (non-PFA) E store 1.4 GJ1.7 GJ1.6 GJ 2.7 GJ Dual solenoid Size R=6.45m |Z|=6.45m R=6.0m |Z|=5.6m R=7.2m |Z|=7.5m R=5.5m |Z|=6.4m LDC + GLD  ILD ILD

Marseille – January 17 th, LC-TPC Collaboration 41 institutes 120 physicists

Marseille – January 17 th, LC-TPC Collaboration Board LC-TPC Collaboration Louisiana Tech: Lee Sawyer Americas: Dean Karlen Europe: Jan Timmermans Asia: Takeshi Matsuda Regional Coordinators: LBNL: Dave Nygren Indiana: Rick Van Kooten Cornell: Dan Peterson Victoria: Dean Karlen Montreal: Jean-Pierre Martin Carleton University: Madhu Dixit Freiburg: Andreas Bamberger LBNL: Dave Nygren Eudet: Joachim Mnich Desy/Uni-Hamburg: Ties Behnke Bonn: Klaus Desch Aachen: Stefan Roth LAL/IPN Orsay: V. Lepeltier Rostock: Henning Schroeder MPI-Munich: Ariane Frey Siegen: Ivor Fleck Lund: Leif Jönsson NIKHEF: Jan Timmermans CERN: Michael Hauschild St.Peterburg: Anatoliy Krivchitch Novosibirsk: Alexei Buzulutskov Ahiroshima,KEK, Kinki University, Saga University, Kogakuin University, Tokyo University A&T, University of Tokyo, Tsukuba University, Mindanao: Akira Sugiyama Tsinghua: Yuanning Gao Collaboration Board Members: Saclay: Paul Colas Goals: This working group plans to understand how to build a super-high-performance TPC for the linear collider physics up to 1 TeV

Marseille – January 17 th, Berkeley Saclay LAL-Orsay Readout anode pad plane: 1024 pads ten rows 2x10 mm 2 pads 1x10 mm 2 pads Saclay: TPC Micromegas (2004) 2 T magnet at Saclay 60  m pitch 50  m gap Copper mesh

Marseille – January 17 th, Saclay: bulk-Micromegas prototypes for T2K Saclay Test Bench Test of MM1_001 detector with a 55 Fe source Micromegas prototypes: Bulk: 34x36 cm 2, 128  m gap 1728 pads of 6.9x9 mm² HARP test at CERN (PS/T9) MM1 detector + FEE + Cooling system HARP solenoid (0.7 T) Field cage 1.5 m drift length Sep. 19 th – Oct. 3 rd 2007 (Analysis in progress) Electronics AFTER designed by Saclay people By T2K/TPC-Europe

Marseille – January 17 th, Saclay: bulk-Micromegas prototypes for T2K Signal from 55 Fe source  = 8.5% 5.9 keV  = ~8% 5.9 keV Saclay Lab Test HARP test at CERN (PS/T9) Energy resolution consistent with lab. test results E = 160 V/cm, B = 0.2 T Source located at 1.54 m from MM detector

Marseille – January 17 th, Saclay: bulk-Micromegas prototypes for T2K 15 GeV/c p-Pb interactions in front of the TPC Cosmic rays in the TPC Y X T Y 55 Fe source HARP test: events display

Marseille – January 17 th, Carleton TPC + 10 x 10 cm² Micromegas (50 μm gap) + resistive anode used to disperse the charge (128 pad of 2x6 mm² pads) Saclay: 5 T cosmic-ray test at DESY Extrapolate to B = 4T at 2 m drift distance:  Resolution of  Tr  80  m will be possible !!! 50  m Dixit, Attié, et al., NIMA 581, 254 (2007) 5 T magnet at DESY + Carleton TPC Resistive anode Micromegas mesh Carleton TPC

Marseille – January 17 th, Saclay: digital TPC using TimePix chip TimePix chip (256x256 pixels of 55 μm) + SiProt 20 μm + Micromegas 6 cm 55 Fe photons in Ar/Iso (95:5) Time mode

Marseille – January 17 th, Tsinghua: TPC prototype with GEM Readout

Marseille – January 17 th, Tsinghua: 1 T cosmic-ray test at KEK Test in Dec Preliminary results !

Marseille – January 17 th, Yuanning Gao: Organiser of the LC-TPC School Tsinghua Univ/CCAST Director of Center for HEP, Tsinghua University Tsinghua: LC-TPC school in Januray 2008 Last week, Paul Colas gave lectures at a school on TPCs at the Tsinghua University in Beijing There are about 50 students from 10 universities in China and Japan, and one French PhD student Max Chefdeville from Saclay and NIKHEF China Center for Advanced Science and Technology

Marseille – January 17 th, Collaboration prospects Yuanning Gao (dir. of CHEP) Yulan Li Max Chefdeville Zhenwei Yang Paul Colas Tsinghua: Saclay: LC-TPC collaboration PC board for the ILC Large Prototype test Tests of Bulk Micromegas Participation in RD51 a world-wide MPGD R&D collaboration (CERN) Saclay  Tsinghua

Marseille – January 17 th, TPCHEP: TPCs for High Energy Physics Members French GroupChinese Group NameTitleAffiliationNameTitleAffiliation Leader : P. ColasDr.DAPNIALeader : Yulan LiProf.Tsinghua M. ChefdevillestudentNIKHEF/ DAPNIA Jin LiProf.IHEP & Tsinghua M. ZitoDrDAPNIAHuirong QiDrTsinghua A. GiganonMrDAPNIABo ListudentTsinghua I. GiomatarisDrDAPNIATing ListudentTsinghua F. PierreDrDAPNIA Mission destinations One 8-day visit for P. Colas and M. Chefdeville for a TPC school and common work. One 7-day visit for Li Yulan and Li Jin at DAPNIA Summary of Project Time Projection Chambers are very successful trackers as they allow 3-D reconstruction of tracks with a minimum amount of matter. The French-Chinese group is interested in developing Micropattern TPCs for High Energy experiments as T2K-ND280 and an ILC detector. DAPNIA has a long experience in Micropattern TPC R&D and Tsinghua is testing a 3-GEM TPC. Both teams wish to cross-fertilize, sharing experience and industrial contacts. DAPNIA and Tsinghua are both members of the LC-TPC collaboration, the next goal of which is to operate a large TPC prototype in DESY in the next 2 years. We plan to contribute together to a ‘TPC winter school’ in January 2008, and to deepen our contacts with the Micromegas team in Lanzhou University

Marseille – January 17 th, Saclay-Lanzhou: initial contact Seminar given by Paul Colas at School of Nulear Science And Technology (Lanzhou) Paul Colas Xiadong Zhang (Institute of Modern Physiscs) Students Seminar

Marseille – January 17 th, Visit of the Institute of Modern Physics (Lanzhou) Micromegas (fishing wires for gap spacer) Fast neutron tomography Gas detector lab Highly charged ion beam

Marseille – January 17 th, Lanzhou & Saclay interests Lanzhou: Atomic physics with heavily charged ions (ion beam trap facility) Fast neutron detection with Micromegas GEM TPC for PANDA Simulation of GEM and Micromegas Acquiring ~1000 channels of integrated electronic channels (for muon radiography) GEP-III experiment and hypernuclear physics at Jefferson lab There are 4 to 7 positions for Chinese students to do their PhD work abroad Saclay: Development of Micromegas, optimization for various applications in HEP, Nuclear Physics and dark matter search Resistive bulk development Digital TPC development (TimePix) Ready to welcome students and postdocs from China

Marseille – January 17 th, Conclusion Saclay and Tsinghua are members of the LC-TPC collaboration Large Prototype final design (plan in 2008) will help the two labs to get closer Ready to welcome Chinese students in France Towards the FJPPL & FCPPL, a France-China-Japan collaboration ?

Marseille – January 17 th, Thank you very much ! Merci beaucoup ! duō xiè

Marseille – January 17 th, Backup slides

Marseille – January 17 th, Bulk Micromegas technology