As of 2025 June 10th, a collimator assembly was added to the beampipe at the remote handling clamp location. The joint is no longer remotely serviceable due to space restrictions in the shielding caused by the addition of the collimator to the beam pipe assembly. The tight timeline of installing the dark light experiment left no time for designing, testing or evaluating any new RH solutions to this joint location.

 

The long convoluted bellows on the previous beam tube was replaced with a much shorter edge welded bellows that is softer than the previous bellows. as such the collimator will droop if the clamp is disconnected. The upstream flange is no longer able to self support from spring force due to the bellows and the weight of the collimator piece, therefore reconnection will be impossible with pole tools. 

 

The threaded pick up collar is also installed because of space constraints in the shielding blocks too close to the clamp and none of our existing pole tools will thread into the pick up with the clamp engaged.

 

The procedure (Document-161529) for handling the joint should be updated to note that the joint is no longer as described and that the procedure outlined cannot be carried out due to these modifications: https://documents.triumf.ca/docushare/dsweb/Get/Document-161529/E-Linac%20Beam%20Dump%20Remote%20Handling%20Procedure%20-%20Document-161529%20-%20Release%201%20-%20Reaffirmed%202025.pdf