Cryo modules

Cryo Parameters (nominal and ultimate from cavities & machine layout & operation)

Parameters

Value1	Value2	Comment	Timestamp
quadrupole bore radius	50 mm	working assumption	2009-10-06
quadrupole length	350 mm	following discussion with A.Lombardi & E.Todesco	6 Oct 2009
list of quadrupole integrated gradients	excel file		2009-10-08
linac length, focusing periods vs energy, extraction sections	pdf file		2009-10-08
doublet length including BPM	1700 mm	following discussion with A.Lombardi & E.Todesco	2009-09-06

Action list

action	person	status/result	Timestamp
shielding requirements for quadrupoles (to protect SC cavities)	W. Weingarten, V. Parma	pending
field quality requirements for quadrupoles	A. Lombardi	pending
verify starting point of SPL	T. Renaglia	done there remains an uncertainty of a few cm	2009-10-06
integration of CEA tuner design, procure drawings	T. Renaglia, W. Weingarten, V. Parma	done: pictures
list of element centres (quads and cavities) for low- and high-beta section	A. Lombardi	done: list reference at the beginning of this page
specifiy whether cavity dimension are given as "cold" or "warm" and verify exact length of CEA cavities	W. Weingarten, F. Gerigk	pending
verify which SPL scenario has been taken to define the diameter of the helium supply lines	U. Wagner, V. Parma	done: scenario changed, see cryo-segmentation workshop, talk F. Gerigk
reconsider the focusing scheme in SPL, FDO, FODO, double the length of focusing periods at high energy	M. Eshraqi, A. Lombardi	pending
verify if the number of low-beta cryo-modules is 9 or 10	F. Gerigk, M. Eshraqi, A. Lombardi	10 b=0.65 modules	2009-10-06
work on more detailed design of extraction geometry (ISOLDE and EURISOL) with BT group	F. Gerigk	pending
estimate warm quadrupole length	F. Gerigk	1200 mm estimate from D. Tommasini	2009-10-06
compact cryo-module design for the options of one long cryo-string and of seperated cryo-modules	T. Renaglia, V. Parma	in progress
overall layout for above options	T. Renaglia	tentative solution (all dimensions need iteration) INTEGRATION_SPL	2009-09-15

Decisions taken

• position of quadrupoles is flexible (centre or beginning of cryo-module), if the position is changed from the beginning of the module to another place the Linac4/SPL transition has to be adapted (03.09.09),
• in the extraction areas to ISOLDE and EURISOL we assume that warm quadrupoles are used (03.09.09),
• assume that BPMs can be placed between the quadrupoles of a doublet, whether it is cold or warm (15.09.09)

Integration of CEA tuner

-- FrankGerigk - 2009-09-04]