Status and possibilities for the irradiation facility in the PS East Hall

Michael Moll, Maurice Glaser

10 March 2010 – IRRAD Working Group

- some notes for discussion -

CERN PS East Hall - Irradiation Facilities

24 GeV/c protons

T7 & T8 beam lines in East Area

· Proton irradiations · Direct exposure to 24 GeV/c protons

(IRRAD1, IRRAD3, IRRAD5)

· Low intensity radiation field of backscattered particles (SEU and Dosimeter testing) (IRRAD6)

· Neutron (mixed field) irradiations · Mixed field produced in cavity after

carbon (50cm) iron (30cm) lead (5cm) ‘target’ (IRRAD2)

Summary of present beam properties

· Proton irradiation facility· 24 GeV/c protons (in spills of ~ 21011 p over 400 ms), ~ 2 x 2 cm2 beam spot,

flux: ~ 1 - 5 1013 p cm-2 h-1

· Shuttle system (10x10x20 cm3) and irradiation tables/boxes for bigger objects

· Neutron irradiation field· complex irradiation field dominated by neutrons,

flux: ~ 2 107 n cm-2 s-1 ( En > 1 MeV ) at 50 cm position

CERN PS Facilities – Operation 2009

· Operation in 2009 (M.Glaser) -- only proton facility operated· 142 days of proton beam to facility· 431 objects irradiated· 337 dosimeter measurements performed (mainly spectrometry of Al foils)

· Most complex irradiations· 12 CMS ECAL & Crystal Clear scintillating crystals (get highly activated)· ATLAS silicon sensors for SLHC (cooling to low temperatures during irradiation)· Optical link system R&D for SLHC (system in operation during irradiation)

· Main part of irradiations performed for· ATLAS, CMS, LHCb· RD39, RD41, RD50, RADMON

· Operation in 2010 (M.Glaser) · expect about 150 days of operation (as in 2009)· 3 weeks of pion beam at the PSI (~280 MeV/c.) + 1 week of setup

M.Glaser, 19th DT coordination meeting (PS-Irrad & GIF) 20/8/2009

Example: 8/09 ATLAS optical links

· LHC Experiments • Atlas Upgrade (Ohio University, K.K. Gan)

• IRRAD1

• IRRAD3

· Participants in upgrade activities· M.Glaser & M.Moll (less than 10% FTE each)· 2009: Fabio Rivero : Student, 4 months, working on general facility services (funded by WP7)

· Activities· Participation in CERN wide ‘Irradiation Facilities Working Group’ and in particular evaluation of

future hadron irradiation facilities (see http://www.cern.ch/irradiation-facilities )· Planning and construction of new irrad. tables and cold box systems (to be continued in 2010)

· 2010· WP7 funding for student (8 months)· Finalization of irradiation table systems· Re-evaluation of plans for future hadron irradiation facilities at CERN and in particular EAST

HALL FACILITIES in light of last Chamonix Meeting outcome • New plans for upgrade of injector complexes: no PS2; PS to be used for another 25 years, ….• New timing for LHC upgrade: more time to set up proper irradiation facilities (??)

Activities - Upgrade of Hadron Facilities

Vortex coolingtested….

to be continuedin 2010

New installations 2009/2010: Irradiation Tables and Irradiation boxes

New installations 2009/2010: Irradiation Tables and Irradiation boxes

Table support system inside facility

Table with ATLAS Tracker cold box

mounted

Table with ATLAS Pixel cold box mounted

inside area(Vortex cooling test)

IRRAD 3

IRRAD 7

M.Glaser & M.Moll, 6th LHC Radiation Workshop, 31.11.2007 -9-

Proposal for facility upgrade

· Present limitations and drawbacks· Irradiation tables are located inside the beam line complex (primary zone)

Access to primary zone needed to enter

Very restricted space, Backscattered particles superimpose primary beam

Personnel exposed to radiation (activated material around irradiation tables – e.g. magnets)

· Neutron facility parasitic to DIRAC

Parasitic operation strongly limits flexibility

· Proton & Neutron facilities located in different beam lines

Parallel operation of two facilities difficult

Proton and Neutron facility ‘competing’ for beam

· Proposal: Proprietary beam line for irradiations· Combine proton and neutron irradiation facilities in one beam line

· Increase space for irradiation areas (less background, less exposure to radiation of personnel)

· Place facility in secondary zone (outside beam line complex)

· Allow access with big objects to the neutron irradiation facility

· Requires termination of DIRAC experiment in T8 beam line

slide from 2007

M.Glaser & M.Moll, 6th LHC Radiation Workshop, 31.11.2007 -10-

PS East Hall – Proposal for facility upgrade

Protons (Shuttle)

Protons (Tables, Boxes)

Neutron field with rail system

for heavy objects and remote access

Neutrons (shuttle)

slide from 2007

Restructuring of the East AreaLau Gatignon

IEFC Workshop – Feb. 2010

Restructuring of the East AreaLau Gatignon

IEFC Workshop – Feb. 2010

What happened to IRRAD1 ?

Restructuring of the East AreaLau Gatignon

IEFC Workshop – Feb. 2010

Remarks for discussion

· PS will be consolidated and continue to operate for many years · Long term investments into irradiation facilities are justified again

· No visible end to operation of DIRAC· Need to wait for DIRAC to stop dating data and dismantle (maybe years ahead to wait …?)· Write a counter proposal to take over the DIRAC area ?

· East area will be restructured· What will happen to the irradiation facilities ?· Are we missing the opportunity for a proper planning of the facilities upgrade?

· Some funding might become available through the AIDA proposal· Requested funds for the facilities: 0.5 Meuros (EU) + 1.5 Meuros (partners)· Need to better communicated with EN to understand what kind of measures

could be taken to increase the proton intensity in the irradiation facility … … How to do? … to be discussed today …

· Needs re-enforcement of man-power (and commitment) on PH side (for facilities operation or upgrade activities)