The East AreaThe East Area

Rende Steerenberg, ps/opRende Steerenberg, ps/op

PS-Days 2001 Evian

PS-Days 2001 Evian

The East Area in a few The East Area in a few numbersnumbers

28 weeks (~4700 hours) scheduled operation28 weeks (~4700 hours) scheduled operation 34 different users on 5 beam lines in 200034 different users on 5 beam lines in 2000

– 2 physics experiments2 physics experiments– 4 test beam areas4 test beam areas– 4 facilities for irradiation tests4 facilities for irradiation tests

>3.8 million spills delivered to the East Area>3.8 million spills delivered to the East Area

~8.8x10~8.8x101717 Protons for all user in the East Area Protons for all user in the East Area

The FacilityThe Facility5 beam lines for 8 areas in 1 5 beam lines for 8 areas in 1

buildingbuilding

4 general purpose beam lines:4 general purpose beam lines:– T7 (south branch)T7 (south branch)– T9, T10, T11 (north branch)T9, T10, T11 (north branch)

2 physics experiments:2 physics experiments:– DIRAC, T8 ( 21 institutes)DIRAC, T8 ( 21 institutes)– HARP, T9ext. (22 institutes)HARP, T9ext. (22 institutes)

4 Irradiation facilities:4 Irradiation facilities:– 3 at T7 (primary protons at 24 GeV/c)3 at T7 (primary protons at 24 GeV/c)– 1 at T8 (secondary neutrons at 1 1 at T8 (secondary neutrons at 1

Mev)Mev)

Beam sharing & Triple PPMBeam sharing & Triple PPM

Triple PPM: One power supply can, depending on the destination, pulse with one of the 3 pre-defined values.

100% South50% South50% North

35% North65% South irrad.100% North

Major changesMajor changes

Auto-destination:• The MTG was updated to be able to calculate the beam destination as a function of the beam request in the different zones

More flexible use of PLSCombined operation:

• Two separate experimental areas n-TOF and the East Area are supplied by two different beams which are generated on one magnetic cycle

More efficient use of PLS time

Irradiation FacilitiesIrradiation FacilitiesT7 beam line, 24 GeV/c ‘high’ intensity primary proton

beam

Irradiation surface 20mm x 20mmtypical intensity ~ 2.5x1011 over 400ms

DIRAC DIRAC (PS 212)(PS 212)T8 beam line, 24 GeV/c low intensity primary proton

beam

Courtesy of the DIRAC team

Magnetic double arm spectrometer.Aim: Measure the lifetime of [pi+pi-] atoms in the ground-state.

HARP HARP (PS 214)(PS 214)T9 beam line, 2 GeV/c – 15 GeV/c secondary proton beam

drift chambers

cherenkov

TOF wall electronidentifier

spectrometermagnet

TPC solenoidmagnet

forward triggerforward RPC

muonidentifier

beam

Courtesy of the HARP team

HARP’s PlanningHARP’s Planning

Run 2000• T9 beam line optics tested.• A four week technical run with partial set-up of the experiment.

Physics run 2001 Measurements with solid and cryogenic targets, 2001

physics run 2002 and beyond... Measurements with incoming Deuterium and Helium ???

T9 beam line optics for HARPT9 beam line optics for HARP

Courtesy of A-S. Muller

Horizontal beam size1.28m before target asfunction of momentum

Vertical beam size1.28m before target asfunction of momentum

What will be done next year What will be done next year ??

29 weeks of East Area operations:29 weeks of East Area operations:– HARP will be using beam for 203 daysHARP will be using beam for 203 days– DIRAC gets 171 days of beam timeDIRAC gets 171 days of beam time– T7 irrad. will irradiate samples during 67 daysT7 irrad. will irradiate samples during 67 days– About 30 user will use the East Area this yearAbout 30 user will use the East Area this year

Improve beam quality and reduce setting-up Improve beam quality and reduce setting-up and ‘switch-over’ timeand ‘switch-over’ time

Improve documentation on the webImprove documentation on the web

Future ‘projects’Future ‘projects’

Next year:Next year:

Long term:Long term:– Three basic periods magnetic cycle ?

– Low frequency ripple compensation.– Semi-automatic dispersion sweep

compensation for DIRAC.

– Semi-automatic dispersion sweep enhancement for the Irradiation facilities.

Three basic period magnetic cycle

EASTB (2bp)

EASTB ISOLDEISOLDE EASTBEASTB

EASTB (2bp) EASTB (2bp)

ISOLDEPSB:PS:

EASTB (3bp)

EASTB

TOF

ISOLDE

ZERO

ISOLDE TOF ISOLDE TOF

TOF

PSB:PS:

Total spill length ~ 1.4 sec for 7.2 sec of PLS time.

19 %

Total spill length ~ 1.8 secfor 3.6 sec of PLS time.

50 %

Three cycles for Isolde

Example:

Two extra dedicated cycles for TOF

Questions ?

..or brilliant ideas ?