Aging test of glass and MRPC

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Presentation transcript:

Aging test of glass and MRPC Wang Yi Department of Engineering Physics, Tsinghua University Outline: aging test of glass aging test of MRPC Conclusions

Aging test of low resistive glass This glass was applied with 1000V for about 32days, integrated charge: 1 C/cm2 --roughly corresponding to the CBM life-time over 5 years operation at the maximum particle rate. Glass specifications:

Comparasion with other material Morales talk @RPC2012 3

Electrode Material Samples length [cm] width area [cm²] thickness volume [cm³] weigth [g] density [g/cm³] layer-1 soda-lime glass 4 16 0.05 0.8 2.0 2.5 layer-2 Si3N4 / SiC ceramics 5 25 0.20 5.0 16.0 3.2 layer-3 semicond. glass 3 9 0.07 0.6 1.6

Experimental Facility Neutron energy spectrum Cyclotron U-120M (Řež) Proton energy 36 MeV Neutron production target Be Neutron flux 108 - 1010 n/cm2/s Neutron energy spectra 1 – 36 MeV Special thanks to A. Kugler and O. Svoboda for their strong support. target support

Test result 6

Setup of irradiation test Hign rate MRPC X-ray Generator 130cm 60cm This is online test system. The efficiency and time resolution can be obtained by cosmic ray while irradiated by X-rays. 0.1C/cm2 charge is accumulated in 35 days.

Current VS. X ray strength Counting rate VS. X ray strength

Efficiency Efficiency VS. dosage Efficiency VS. X ray strength

Current

Counting rate

Charge spectrum First ten days Before irradiation Third ten days Second ten days

Time resolution

Conclusions From high voltage, neutron test, we did not find any aging problem for low resistive glass. We also studied the long term stability of high rate MRPC. 0.1C/cm2 charge is accumulated.

Thanks for your attention !