= Design and Integration meeting: 30 March 2026 10:00 BST =

'''Zoom:''' https://us06web.zoom.us/j/9842827712?pwd=Q1Nzd0RaVkc3SEtpaGJzaWZxSTh3QT09

== Agenda ==
* Simulations (including ion discussion with Nick Dover)
* IPAC paper
* Collaboration meeting agenda.
* AOB

== Notes ==
Present: WS HO MMC CW JP TJK ND\\
Absent:  KL MP\\

* Simulations
	* Discussion with ND on carbon ion beams:
		* Little data available in literature. TNSA not effective for ions. One paper has studied but at low energy. 
		* Simulation work needed with PIC codes, lack of personnel to undertake.
		* similar spectral shape expected in theory possible to adapt Lara linear optics. Scale Q/M ratio. Conversion efficiency around 3 to 6%.
		* Could expect 10^8^ ions up to a maximum ~ 10 MeV/u.
	* Discussion with ND on electron distribution:
		* no one measured electron distribution. Evidence suggests complete space charge cancellation, ie co-propagating electrons with same velocity distribution.
		* fast electrons (5 to 10 MeV) Will hit the nozzle causing it to charge and potentially deflect the lower ion beam. Timescale too short for charge to dissipate.
		* likely that the first electrons follow the laser angle rather than the proton beam. 
		* Large angle assumption is valid similar to protons. Some will still enter the nozzle, order a few percent. Typically 30° incident angle, and 30° divergence.
		* Very relativistic, space charge unimportant.
	* MMC update: RF track matches the BDSIM model but not the emittance. Unsure why, still investigating. WS email KL regarding GPT access.

* Collaboration meeting agenda.
	* JP out 15th-29th April
* IPAC paper
	* Draft deadline agreed for Friday 1st May.
* AOB
	* None