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Radiation Test of LV Supply and Components in PSI (2002)

This document presents the results of radiation tests conducted on LV supply and components in PSI. The tests include component testing and module testing, evaluating the performance under specific radiation conditions.

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Radiation Test of LV Supply and Components in PSI (2002)

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  1. Radiation test of LV supply and components in PSI 30.6.2002 • Requirements: • tid max 32 krad / 10years • see 1.75e12 p/cm^2 • beam has 5e8 p/cm^2/s ~ 7 minutes to reach 30krads to get 1.75e12 p/cm^2 for SEE test and in the same time to limit TID we had to multiply the number of components tested by 8 • Component test • Tested MOSFETS for SEE • Primary side of DCDC • IRFP460 TO247 • IRFP9N60 TO263 (SMD) • Secondary side of DCDC • IRF260 TO247 • IRF3710 TO263 • Module test • Original LT converter based on LTC1698 & LT1681 • Half bridge converter with IRFP460, IR2110 & UC3526 • Optically isolated amplifier with HCPL7840 & LM6142 Ivan Hruska,Francisca Calheiros

  2. Radiation test of LV supply and components in PSI 30.6.2002 • Component tests • Test1 - SEE in irfp460 6 samples • 200V Uds , Flux -> 5e8 p/cm^2/s 40krads -> 9.5 minutes - 2.91e11p/cm^2 • result =NOSEE • Test 2 - same as 1 but 250 Vce • result NOSEE • Test3 - SEE in 8x IRF3710 • unfortunately 200V on collector for 3 minutes then 50V set then conditions as test1resulllt NOSEE • Test 4 - Same as 3 • Increased voltage to 80 V ,other conditions the same • result NOSEE • Test5 - 8x IRFP9N60 • 200V Uds • result NOSEE • Test6 - same as 5 • 250V Uds • result number 4 had SEE after ~8minutes • rest NOSEE Ivan Hruska,Francisca Calheiros

  3. Radiation test of LV supply and components in PSI 30.6.2002 • Module test • Test 7 - LT DCDC converter • 40v input 5v/9A output • Up to 17 krads working well • 6V output shift ~ 17krads & SEE • then continue 19.2krad next SEE • then continue up to 28.2krads and there was again SEE • then continue up to 38 krads and again SEE • then after stop the beam without power cycling function is back • Test8 OIA • two ramps without radiation • 20krads • ramp • 10krads • ramp • 10krads • ramp • Preliminary result is that transfer function is still linear with constant gain up to 40krads Ivan Hruska,Francisca Calheiros

  4. Radiation test of LV supply and components in PSI 30.6.2002 • Test9DCDC Halfbridge30krads withouut on-lineoutp.voltage drop to 0 but fuse still OK. Suspicious high-side driver IR2110 ?? • Test108x IRFP260result NOSEE Ivan Hruska,Francisca Calheiros

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