ESTB Test Beam Upgrades

HadronsShorter bunch length

Carsten HastMarch 17th 2011

C.Hast, ESTB Workshop SLAC, March 2011 2

Secondary Hadron Beam Properties

Beam Properties at Detector Plane

x=1mm y=1.4mm

E/E=1.3%

Divide by 4 for 250 pC

C.Hast, ESTB Workshop SLAC, March 2011 3

ESTB Stage II: Hadron Production

• Add Be target, beam dump, analyzing magnet, momentum slit, and quadrupole doublets to produce a secondary hadron beam

• Production angle = 1.35O and Acceptance = 10 sr

• Move Collimator (BSY)• Design, build and install Be-target (BSY)• Design, build and install insertable dump / collimator (BSY)• Retrieve and install bend magnet (for momentum selection) (ESA)• Retrieve and install 4 quadrupoles (BSY/ESA)• Design, build and install collimator (ESA)• Additional vacuum system (ESA)• Many any other odds and ends

4C.Hast, ESTB Workshop SLAC, March 2011

ESTB Stage II: Components

Serious effort!Needs to be driven by user demand!

C.Hast, ESTB Workshop SLAC, March 2011 5

Shorter Bunch Length for ESTB

• Interest for shorter bunches (CLIC, accelerator R&D, etc)

• LCLS ultra-short bunch length: 10 m and shorter

• In A-line, bunch length increases to 280 m due to strong bends (24o) and large (optics) R56

• With existing optics: 20-30 m bunch length is possible if one manages to reduce R56 by a factor 3-4 and keep E=0.02% Lew, Ted and Jury are looking into that

• Possible to preserve short bunches in ESA with adequate $ support by interested parties …

Summary• Production of Hadrons is possible for late 2012 if

– Demanded by users – Funding is made available

• Short bunch length might be possible– Currently under study– Funding needs to be found

6C.Hast, ESTB Workshop SLAC, March 2011

Production of Hadrons would add

desirable capabilities to ESTB