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Progress on liquid xenon cryogenic system using pulse tube cryocooler at KEK

Progress on liquid xenon cryogenic system using pulse tube cryocooler at KEK. D_R&D_6 Liquid xenon detector technology. Tom Haruyama (KEK) Alain Mery , Eric Morteau, Patrick Le Ray Cyril Grignon, Noel Servagent Jean-Pierre Cussonneau Dominique Thers (Subatech, Nantes).

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Progress on liquid xenon cryogenic system using pulse tube cryocooler at KEK

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  1. Progress on liquid xenon cryogenic system using pulse tube cryocooler at KEK D_R&D_6 Liquid xenon detector technology Tom Haruyama (KEK) Alain Mery, Eric Morteau, Patrick Le Ray Cyril Grignon,Noel Servagent Jean-Pierre Cussonneau Dominique Thers (Subatech, Nantes) FJPPL’08, 15-16 May 2007, Paris, France

  2. …following Alain’s talk…. 1. Xenon properties 2. Pulse Tube Cryocooler Development at KEK 3. LXe cryogenic system launched at KEK 4. Summary and plan for this year

  3. Liquid xenon - any specialties in cryogenic? -From Tc to Triple point --> 3K -Low latent heat to solid --> precise temperature control => Pulse Tube Cryocooler

  4. KEK-developed High-Power Pulse tube Cryocooler Advantages: -Just switch on! For… -Precise temperature and pressure control, -LN2-Free operation -Quiet, maintenance free for years’ operation KEK-Iwatani PC150

  5. PC150 Pulse Tube Cryocoolers on LXe projects so on, as of May 2008 PSI (MEG) KEK,KAMIOKA (XMASS) COLUMBIA Univ. NANTES (PET) CERN GRAN SASSO (XENON)

  6. LXe cryogenic system launched at KEK -for LXe detector development -for basic research on LXe -for study on real application to PET

  7. LXe cryogenic system at KEK P Circulation Pump (max:20L/min) P m P Heat exchanger PTC 0.75m3 Tank TPC Xe cylinder 99.999%Xe H2O, O2<0.1ppm SAES Getter Monotor Recovery Bottle(3.75L) Inner volume ~4L

  8. LXe Cryogenic system at KEK Gas handling panel 0.75m3 Tank PT Cryocooler 700W compressor Test chamber

  9. Cooling test of miniature PT Cryocooler -PTRPDC08（8W at 77K：Iwatani） -Air cooled compressor (700W at 50Hz） -20W at 147K confirmed →24W at 165K

  10. Cooling, Liquefaction, Pump circulation test Foil heater PT100 50mm 50mm 10mm Results: - 5 hrs for pre-cooling by PT cryocooler only - 0.16L/h liquefaction speed - 2 L/min of pump circulation for purification

  11. Summary and plan for this year Collaboration research: - Study on pre-cooling performance - Vibration reduction of PT Cryocooler at Nantes - Circulation purification of Xe gas Cryogenic system for LXe experiments at KEK: - For basic investigation of LXe properties - Verify LXe purification technique - Technology to handle a large amount of LXe in future

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