1. PSI - February 3, 20031F. Sergiampietri MEG – PMT cryogenic test: PURPOSES -SYSTEMATIC TEST OF THE PMT’s FOR MEG IN OPERATING CONDITIONS -BUILD AN EVOLUTIVE CRYOSTAT: PHASE 1MANUAL OPERATION WITH LXe EMPTING/FILLING FOR EACH PMT PHASE 2MANUAL OPERATION WITHOUT LXe EMPTING PHASE 3TEST OF CARTRIDGE OF PMT’s WITHOUT LXe EMPTING -SETUP A CRYOGENIC LABORATORY AT INFN-PISA -GET EXPERIENCE IN HANDLING LXe -OTHER MEASUREMENTS ON LXe -TESTS ON OTHER PMT’s AND OTHER DEVICES (APD’s, …) FOR THE MOMENT … PHASE 1 

2. PSI - February 3, 20032F. Sergiampietri MEG – PMTct – Cryogenic/Vacuum Diagram

3. PSI - February 3, 20033F. Sergiampietri MEG – PMTct - Cryostat

4. PSI - February 3, 20034F. Sergiampietri MEG – PMTct - Cryostat REFERENCE PMT HAMAMATSU R6041Q

5. PSI - February 3, 20035F. Sergiampietri MEG – PMTct - Cryostat TRIGGER PMT HAMAMATSU R7400U-09 ,  SOURCE HOLDER

6. PSI - February 3, 20036F. Sergiampietri MEG – PMTct - Cryostat FIXED SUPPORT FLANGE FOR REFERENCE PMT AND SOURCE HOLDER REFERENCE PMT HAMAMATSU R6041Q SOURCE AND TRIGGER PMT HOLDER

7. PSI - February 3, 20037F. Sergiampietri MEG – PMTct - Cryostat INSERT HERE GATE VALVES + LINEAR VERTICAL MOVEMENT (PHASE 2-3) REMOVABLE SUPPORT FLANGE FOR PMT UNDER TEST TEST PMT HAMAMATSU R6041Q REFERENCE PMT HAMAMATSU R6041Q SOURCE AND TRIGGER PMT HOLDER

8. PSI - February 3, 20038F. Sergiampietri MEG – PMTct - Cryostat CRYOSTAT HEAD FLANGE

9. PSI - February 3, 20039F. Sergiampietri MEG – PMTct - Cryostat INNER VESSEL (LIQUID Xenon)

10. PSI - February 3, 200310F. Sergiampietri MEG – PMTct - Cryostat HEAT EXCHANGER COPPER BODY

11. PSI - February 3, 200311F. Sergiampietri MEG – PMTct - Cryostat LN 2 IN N 2 OUT LN 2 HEAT EXCHANGER COIL LXe TEMPERATURE CONTROLLED HEATING RESISTORS

12. PSI - February 3, 200312F. Sergiampietri MEG – PMTct - Cryostat VACUUM CHAMBER

13. PSI - February 3, 200313F. Sergiampietri MEG – PMTct - Cryostat

14. PSI - February 3, 200314F. Sergiampietri MEG – PMTct – Status of Phase 1 Cryostat -FULL DESIGN AND MECHANICAL DRAWINGS COMPLETED -CALL FOR TENDERS MADE AND JOB ASSIGNED TO THE COMPANY CINEL-Vigonza (PD), Italy -CRYOSTAT DELIVERY EXPECTED BY THE END OF FEBRUARY -ORDERS MADE FOR DRY UHV PUMPING GROUP, LEAK DETECTOR, UHV COMPONENTS, CRYOGENIC BOTTLE, PMT’s … -LABORATORY PREPARATION UNDER WAY