Report CERN LM V3

Report from the Round table discussion on Long Nb3Sn Magnets,held at CERN on March 24, 2005 : 

Report from the Round table discussion on Long Nb3Sn Magnets, held at CERN on March 24, 2005 bnl - fnal- lbnl - slac US LHC Accelerator Research Program LARP Collaboration Meeting 4, Port Jefferson, 4/7/05 G. Ambrosio

Round table discussion on Long Nb3Sn Magnets: 

Round table discussion on Long Nb3Sn Magnets Participants: G. Ambrosio (FNAL), S. Bartlett, S. Gourlay, S. Mattafirri (LBNL), P. McIntyre (Texas A&M Univ.), A. Devred (CERN & CEA), R. Maccaferri, L. Rossi, D. Tommasini (CERN), A. Den Ouden (Twente Univ.) Talks: Long Sub-scale coils (S. Bartlett) Furnace for Nb3Sn long coils at Texas A&M U. (P. McIntyre) Long cos-theta coil (N. Andreev, G. Ambrosio) Long coil R&D plan (G. Ambrosio)

Upgrade TEXAS A&M Univ. furnace and impregnation fixture: 

Upgrade TEXAS A&M Univ. furnace and impregnation fixture Vertical Furnace, present characteristics: Max coil length: 54 inch (1.4 m) Temperature uniformity: ~2.5 C (tuning each Kiln with dedicated TC) Possible upgrade to 4m: 9 additional kiln units $20k additional spool $20k overhead lift lengthening $40k Technician 0.7 FTE Impregnation fixture: Max coil length: 124 inch (3.15 m) Possible upgrade to 4m: Total cost: $30k

Cost of new furnaces: 

Cost of new furnaces Quotes: ~$100,000 4 m working area, side loading, gas tight, The Grieve corporation, Round Lake IL (?) $114,000 – 119,000 4 m working area $131,000 – 140,000 6 m working area Side loading – shuttle furnace Working area cross-section: 0.5x0.5 m Load: 500 Kg/m L&L Special Furnaces Co, Aston PA

Furnace – my conclusions: 

Furnace – my conclusions We should buy a new furnace, We should start a Working Group with the goals of: Set specs for the new furnace, Collect and evaluate quotes, So that on October 1st we are ready to place the order! … please let me know if you are interested in participating

Long Sub-scale Coil: 

Long Sub-scale Coil Concept and plan will be presented by GianLuca Sabbi Coil Module Present Sub-scale Coils ~25 cm Long Sub-scale Coils 4 m

Long Sub-scale Coil - Comments: 

Long Sub-scale Coil - Comments Questions: How do you deal with coil volume increase? How do you control coil dimensions? How do you get useful information for the successful heat treatment of long shell-type coils (baseline design for LM)? Can you reproduce the conditions of long shell-type coils during the heat treatment? Comments: You need to control coil geometry before and after heat treatment (for instance: NO cable width increase and nominal coil thickness increase in order to simulate a shell-type coil with only azimuthal expansion allowed) A working magnet is not enough! You need to learn  tight parameter control.

Cos-theta mirror: 

Cos-theta mirror Concept will be presented by Nicolai Andreev Present: 1m mirror magnet, Proposal: 2m mirror, then 2m dipole, then 4m dipole

Cos-theta mirror - Comments: 

Cos-theta mirror - Comments Comments: You need to focus on quadrupole magnets and have a successful long quadrupole (F  90 mm, G  250 T/m) by 2009, because CERN is going to take in 2009 basic decisions about future large projects (including the LHC-upgrade). Optimal length is 5.5 m (as the present MQXB quads), 4 m is acceptable Similar comments may be found in the recent letter by L. Rossi to S. Peggs: “The manufacturing of a successful prototype for 2009 is real vital to the whole magnet program, on both side of the Atlantic. Year 2009 is crucial since, according to the today plan set by the CERN DG, is when basic decisions on CERN future large projects will be taken”

How much important is this goal?: 

How much important is this goal? Option 1: “It’s a milestone in a larger program” Option 2: “It’s DEATH or LIFE for all major R&D programs on Nb3Sn accelerator magnets in the world”  The Domino effect… What do we think about this issue? The plan depends on this answer. LHC upgrade, NED, CEA, LARP-Nb3Sn, US-Nb3Sn-baseprograms ?