Technical report for ISOLDE

1
Technical report for ISOLDE

• Mats Lindroos on behalf of the ISOLDE team

2
Outline

• Separator status
• REX
• Developments and integration status
• ISOLDE organization
• Responsibilities
• New staff
• Beam preparation activities
• EURISOL/EURONS news
• Recent technical development work
• ECR
• Shutdown planning

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GPS and HRS

• GPS operation limited to 30 kV since July
• Suspect problem with insulator
• Peek material better vacuum properties but
  worse resistance to sparking
• Operation with a single vacuum pump since late
  July
• To be replaced in March 2005
• Repair?
• HRS running well
• One vacuum pump replaced in October after failure
  of both pumps (staggered in time)
• Resolution of HRS limited by design fault
• Decision of the future of HRS in the upgrade
  group
• Second GPS or Real HRS

4
Front-end 6

• Front-end 6 assembled
• Waiting for ceramic insulator
• To be tested in building 275 before installation
  in March

5
REX integration

• All (5) REX posts filled and successful shutdown
  and maintenance executed in 2004
• Staff situation critical for peek need during
  runs
• Need for scheduled Machine Development (MD) time
  for difficult beams
• Technical support for low energy stage too low
• Operation team, supervisor team, must be formed
  for on-call support and setting-up

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ISOLDE organization
AB
PH
ADM
ATB
BDI
BT
CO
OP
PO
RF
ABP
IS

• Technical coordination
• EURISOL coordination
• Target and ion source production
• Front-ends and robots
• ISOLDE experimental area
• Target RD
• REX integration
• RILIS

• Operation
• ISOLDE optics (electrostatic)
• TSO
• Alignment
• General technical support
• Application programs

• Scientific programme
• Scientific coordination
• Liaison with collaboration
• Liaison Users
• EURONS
• Future scientific strategy
• TARGISOL

New staff at ISOLDE tech. late 2004 Magnus
Eriksson (OP), Nikolai Trofimov (CO) and Pascal
Fernier (OP, 50)
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ISOLDE responsibilities

• ISOLDE PH
• ISOLDE Physics group leader
• Leads the scientific programme at ISOLDE
• Chairs the ISOLDE upgrade group
• CERN representative in the ISOLDE collaboration
  committee
• Responsible for the ISOLDE collaboration budget
• Responsible for external scientific collaboration
  at ISOLDE
• Leads the technical development for isotope
  manipulation within EURONS and EURISOL at ISOLDE
• CERN responsible for EURONS
• ISOLDE Physics coordinator
• Responsible for the ISOLDE schedule
• Responsible for ISOLDE User liaison
• Responsible for liaison with AB
• Scientific secretary for INTC
• ISOLDE AB
• ISOLDE technical coordinator (ATB)
• Coordinates ISOLDE operation, maintenance and
  technical RD
• Chairs the weekly coordination meeting
• Responsible for REX integration

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ISOLDE operation

• ISOLDE OP team
• 1 Physicist
• 2 technicians
• 50 of a technician
• Plan for 2005 run
• Operation with 5 person piquet team
• Technician available in the ISOLDE control room
  for 4 hours each working day
• 2 Technicians replace all additional support
  earlier given by 2 technicians and 1 engineer

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EURISOL and EURONS
EURONS I3 1.5 MCHF Transnational Access 0.6
MCHF Joint Research Activities new staff mostly
in PH (DAQ, admin and RD) EURISOL DS 2.8
MCHF (CERN leads 3 tasks) new staff mostly in
AB (RD) EURONS EURISOL enable RD in
targets b-beam (AB) radioisotope
manipulation (PH) safety (SC)
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ISOLDE control system

• All applications except scanners and wire grids
  available in LINUX
• Problems
• Slow start-up
• Slow response
• Change of log book page each day
• Report bugs to Tim Giles
• Shutdown work
• Address response problems
• New applications for instrumentation and yield
  measurements

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REX LE Developments in 2004
Element Charge A/q Breeding time (ms) Comments
9,11Li 2, 3 4.5, 3.0 5-8 Without/with stripper foil Ne and Ar buffer gases
24-29Na 7,8 3.43 4.14 15
28,30,31,32Mg 9,7,8,9 3.11-4.29 14-18
88Kr 21 4.19 38
74,76,78Zn 20,20,21 3.62 3.71 38 (2003)78 (2004)
122,124,126Cd 30,30,31 4.06 4.13 148
156Eu 30 5.2 38 Only RFQ 300 keV/u
153Sm 27,28 5.46-5.67 30 Only RFQ 300 keV/u
70Se 17 4.12 33 Molecular sideband
17F 5 3.4 8 With stripper foil
110Sn 27 4.07 98
148Pm 30 4.93 38? Only RFQ 300 keV/u

• New isotopes
• Molecular beams
• Rotating wall cooling
• No clear advantage compared to side band cooling
• New control system from GSI for trap
• Many thanks to GSI!
• Record charge breeding efficiency (Trap out to
  EBIS out)
• 23 for 39K10

Radioactive 110Sn into REXTRAP 110 pA after
REXTRAP 48 pA after mass sep. 115 pA in 27 98 ms
breeding time trap eff 44, EBIS eff 9
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REX linac developments in 2004
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Target and ion source development

• The very active target R D program in close
  collaboration with experiments has always been
  the secret of the success of the ISOLDE physics
  programme
• The tradition will continue, examples from 2004
• ISOLDE RILIS used for gt50 of all shifts, RD!
• Tests with solid state lasers off-line (Mainz
  univ.)
• Negative ion source (ISOLDE and KENIS, ORNL)
• Measurement of transverse shockwaves with tests
  with laser vibrometer
• New target materials
• LaCx synthesized
• SiCx from TRIUMF tested
• Note 3 FTE per new element/isotope!
• User support essential to advance many
  developments
• Strongly integrated with ISOLDE EU activities

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Beam preparation at ISOLDE

• Successful charge breeding with an ECR Phoenix
  source at ISOLDE of radioactive ions
• Major problem with background to be addressed in
  6th framework programme
• The beam preparation activities move to the PH
  ISOLDE physics group in 2005
• RFQ cooler activity continues in AB-ATB to
  complete started project
• EURON fellowship and EURISOL beam preparation
  post to work on these activities

Successful charge breeding of 94Rb14,
96Sr13,14,15, (130Inx and 130Csx) 46,47,48Ar,
92xxKr and 138,142,144Xe Efficiency
estimates 96Sr15 2.6-3.7 efficiency 96Sr14
2.9-4.2 efficiency 96Sr13 2.2-3.0
efficiency IS 400, Beam purification of noble gas
beams
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Shutdown

• Shutdown planning established
• Key dates
• End of run 11/11/2004 am
• Shutdown courses 29/11-10/12
• Stable beam stop 10/12
• No cooling water (possible power cuts)
  10/12-18/1
• Start of off-line running 21/3
• Start-up of physics programme 25/4
• Key tasks
• Installation of new front-end
• Repair of REX EBIS magnet
• Wall removed between extension and hall
• Dust barrier being installed
• Schedules at ISOLDE web site and at REX web site
• CERN schedule holds several key dates even for
  ISOLDE!