Interlock Defeat

System(s) Affected:
RF

Interlock to be Defeated:
EGUN:INTRF interlocks bypassed

Implementation:	Number:
Date: 2024-08-19 Time: 12:38:00	2024-425
Implemented By: Brandon Humphries
In Consultation With:

Status: Removed

Estimated Duration:
2 days

Reason for Defeat:
To allow for turning on the EGUN RF amplifier for RF tests on the EGUN RF tuner (EGUN:RFTUN) with the E-Hall open (therefore EGUN:BIAS HV off).

Number of Yellow Tags:
2

Location of Defeat Tag(s):
1- On cork board in back of DCR

1- On safety system box on E-LINAC side of the DCR

How Was Defeat Implemented?
Where is Defeat Located?:
Interlocks bypassed through the Bypass/Force utility in EPICS. The EGUN RF amplifier is on the E-Hall roof in MAC-EHR-010.

Describe Alternate Protection:
The EGUN:INTRF interlocks are for machine safety to prevent beam spills, but with the E-Hall open the EGUN:BIAS can't be turned on and therefore no risk of beam spills.

Fault Reports:

Work Permits:
A2024-08-19-1

Disables:

Interlock Defeat

Removal:	Number:
Date: 2024-08-22 Time: 08:26:00	2024-425
Removed by: Brandon Humphries

Status: Removed

Interlock Verification Method:
After removing bypass from EGUN:INTRF, lowered EGUN:BIAS to 296 kV to verify interlock. Passed. See e-log thread:

https://web.accel.triumf.ca/elinac_elog/Elog_show_result.pl?inid=55973&style=thread&timemode=eventtime

Number of Tags Removed:
2

Comments: