= Design and Integration meeting: 15 August 2023 15:00 GMT =

'''Zoom:''' https://ukri.zoom.us/j/99571436156

== Agenda ==

* Actions from last meeting.
* Simulations.
* Engineering.
* AOB
== Actions ==
|| 23-01-24-01 || '''All''' to prepare document for the milestone to update the baseline || In progress

== Notes ==
Present:  Neil Bliss,  Clive Hill, Mark Johnson, Ajit Kurup, Keith Middleman, Jaroslaw Pasternak, Lilli Platt, Rehanah  Razak,  Will Shields, Colin Whyte\\
Apologies:  Ken Long, Hywel Owen

	* Keith Middleman senior vacuum design engineer
		* Looking at the gas flow through the target vessel interface with the first gabor lens.
		* Using MOLFLOW+ (free software for accelerator vacuum modelling ).
		* Looked at gas desorption from the target in a diffuse scenario and for different narrower angular spreads.
		* CW: Would be good to do an experiment. 
		* From the simulations it looks like the vacuum should be OK but depends on how strong the beaming affect is.
		* Need to also consider gas desorption from the other surfaces of the target vessel.
		* KM will prepare a paragraph and the tables for the design review.
	* Engineering update - NB
		* Meeting tomorrow in Strathclyde to discuss target configurations.
		* Further FEA work on the FETS vacuum chamber.
			* Looking at trying 8mm wall thickness instead of 10mm by including radii in the corners to reduce stress.
		* Power consumption
		* Schematic update.
			* Need reference design for profile monitor and the cavity to determine if the gap between lenses 2 and 3 is realistic.
				* JP to provide cavity dimensions.
				* AK to ask FETS for details of profile monitor.
				* WS will ask IBA for details of their profile monitors.
			* WP5 are charged with beam instrumentation.
			* Discussion on position of the collimators.
				* One after Gabor lens 3 
				* One just before the vertical bend  
				* One half way along the vertical arc. 
		* Slide from CH on the schematic.
			* Adjustment of the positions of the Gabor lenses.
			* Length between lenses 3 and 4 is critical.  
	* Simulations
		* Slides on end station dose from WS
			* File that was found does not have the correct input beam so it looks like the data used in the pre-CDR was lost.
			* New BDSIM model
				* Uses slightly different physics list. 
			* 12.2 Gy/shot instead of 12.8 Gy/shot quoted in the pre-CDR.
		* Slides from LP on octupole and collimator optimisation. 
		* Details from JP on FFA design.
			* Found working point for high-intensity operation by using a small D (instead of a small F doublet)