Results of the functional radiation test at CHARM

Results of the functional radiation test at CHARM Surbhi Mundra (TE-MPE-EP) 12/15/2021 Document reference 2

Contents • Test methodology • • Results • • Test setup Input Signals Data recorded Timelines Events observed Results Conclusions 12/15/2021 Document reference 3

Test setup • • • Differential sinusoidal signals with amplitude 18 Vpp and frequency 10 m. Hz were used as U 1, U 2 A fix voltage of 4. 265 V was used as Heater discharge supply voltage Interlock loop was provided with 60 m. A current using 12 V, 2 kΩ 1 kΩ resistors were used loads to mimic DQHDS relay loads Heater trigger signals and interlock loop status were monitored to observe quench detection Configuration bytes are also recorded using World. FIP communication and saved on NAS server 12/15/2021 Document reference 4

Recorded data types • With National Instrument I/O box • • • Interlock status @100 Hz Heater trigger @100 Hz Using World. FIP communication • • • Analog voltages @10 Hz Status registers @10 Hz Configuration data, 1 byte per WFIP cycle 12/15/2021 Document reference 5

Timelines 2 Runs over 2 weeks Run 1 radiation levels: 0 - 218 Gy (~44 Gy/day) Run 2 radiation levels: 218 - 450 Gy (~44 Gy/day) 12/15/2021 Document reference 6

Events observed 12/15/2021 Document reference 7

Events observed 12/15/2021 Document reference 8

Results: supply monitors Run 1 UHDS 1: -1. 55 V/Gy, 730 V @ 119 Gy UHDS 2: -1. 377 V/Gy 760 V @ 119 Gy UPS 1: -2. 3 m. V/Gy, 5. 24 V @ 119 Gy UPS 2: -2. 3 m. V/Gy , 5. 23 V @ 119 Gy Run 2 UPS 1: -0. 7 m. V/Gy, 5. 05 V @ 305 Gy UPS 2: -0. 7 m. V/Gy , 5. 05 V @ 305 Gy UHDS 1: 15. 6 m. V/Gy, 903. 1 V @ 305 Gy UHDS 2: 11. 8 m. V/Gy 903. . 3 V @ 305 Gy • • • UHDS shows drastic change with dose over 70 Gy, small deviation in Run 2 Implementation same as DQHSU as used in tunnel successfully IHDS 1 observed to be 0 -13 A through both runs UPS voltage shows constant decay through both runs 12/15/2021 Document reference 9

Results: Trigger voltage of EXTB 12/15/2021 • A variation of less than 1% was observed in channel gain for EXTA, EXTB, INTA, INTB • Offset voltage of the two channel increases rapidly for higher dose rate • This increase in offset combined with change in amplitude leads to increase in UQS 1 → Trigger Document reference 10

Conclusions • • The system along with DQAMC works well up to 110 Gy The system with change of DQAMC works well upto 310 Gy Single events occurrence can be related to reset due to loss of communication and can be rectified with change of firmware Offset check and correction needs to be implemented at regular intervals after installation 12/15/2021 Document reference 11

Questions? 12/15/2021 Document reference 12

Instance of single interlock opening 12/15/2021 Document reference 13

Results: Trigger voltage of EXTA 12/15/2021 Document reference 14

Results: Trigger voltage of INTB 12/15/2021 Document reference 15

Results: Trigger voltage of INTA 12/15/2021 Document reference 16