Technical report for ISOLDEINTC 19 May 2007

Mats Lindroos

Mats Lindroos

Outline

• Shutdown work– Planning– Ventilation– Water cooling system for Front-Ends– Front-End 6– REX-ISOLDE

• HIE-ISOLDE– Where are we?

Mats Lindroos

Shutdown planning

Mats Lindroos

Start-up period

Mats Lindroos

5

Major changes for 2008 Release of activated air

HRS GPS0.00E+00

5.00E+02

1.00E+03

1.50E+03

2.00E+03

2.50E+03

chim

ney

mo

nit

or

kBq

/m3

April to December

2007 2006 2005

Radiation monitor PMVG170C showing higher levels compared to 2 previous years

Proton beam current to GPS limited to 1µA (norm. 2µA)

Modification of Ventilation System

• In order to reduce the activated air emissions encountered during 2007, the ventilation system has been reversed and measures have been taken to improve the air-tightness of the area.

• Tests to be carried out over the next few weeks.

GPS HRS

GPS HRS

Actual situation

Modification

Target Cooling Water Panel

• Orphan• Dependant on

vacuum controls. The failure of one affects the other

• Difficult to access (inside primary zone)

• No spares

• Maintained by ST-CV• Completely

independent from vacuum sequence

• Easily accessible during operation.

• Spares available• Easy to operate user

interface

Before >

< After

Aluminium oxide blocking pneumatic systems

9

‘Meyrin’ compressed

air

Isolde facility

Compressed air system: Broken

filter inside one of the air dryer tanks

Low energy shutdown works: main projects

REX- ISOLDE

* REXTRAP - exchanged insulators etc at internal structure

Done. Some discharges when starting up, but conditioning helps.

• REXTRAP - enlarge the internal differential pumping diaphragms Partially done. Preliminary test show an efficiency >60% Followed up with dedicated radioactive ion deposition test, e.g. 42K

* REXTRAP - adjust and consolidate the RF excitation electronics Done, but still not possible to avoid antiresonance for all masses. -> adjust the amplifier for the desired mass range -> wait for a new version in connection with the REXTRAP upgrade

* REXTRAP - proposal for complete trap consolidation

Awaiting AB management decision

* REXEBIS – find the reason for the LHe filling blockage Inspected inside. No blockage found.

* REXEBIS – identify the reason for large N2 peaks Much time invested. Gate valve exchanged. Peaks smaller but still present.

REX linac shutdown works

• IHS cavity stability above 50kWCoupling loop dismounted and cleaned, checked cavity adaptation, loop gain… -> Problem not fully solved, still too many interruption due to reflected power

• Linac water cooling circuits consolidationNew interlocks, replacement of damaged pipes, maintenance of IHS closed circuit

• Amplifier cavities and RF tubes cleaningLong time without maintenance, insufficient air filtration

• RF room ventilationChanged to a close circuit ventilationUnfortunately the cooling unit is not adapted to this mode of operation -> Need a new cooling unit

• Replacement of magnetic steerersA project has been started for the replacement of the linac steerers during shutdown 2008-09

REX- ISOLDE

REX status

The whole REX machine is up running (diffciult startup as always)

Tricky 9C(O) and 10C(O) beams first experiment -> After some struggle 10C beam could be accelerated

Linac well setup – scaleable:- A beam of 10C was delivered at 2.9MeV/u during the first run- Sstripping foils were used 10C3+ -> 10C6+ (80% efficiency / background free)

1. Test mass separation inside the trap Improve the REX decay analyses prog. + verify this with tests

2. Beam (cw and pulsed) from RFQ cooler into REX dedicated tests necessary (no time during the startup)

3. 35Ar/35Cl suppression postponedno time before the C(O) runafter the run the target ion source broke

4. Emittance measurements for linac started

5. Injection of Minimono (1+ ECRIS) into REXTRAP

REX- ISOLDE

Diploma student A. Gustafsson

Pre

sen

t st

atu

sIm

med

iate

d

evel

opm

ent

pro

ject

s

FE6 and Off-line

• Vacuum equipment installed

• Extensive testing of beam optics

• Preparation for installation– Specifications for software

and hardware under way

• Beam energy measurement device installed for the precise measurement (+/- 0.1V) of secondary beams.

• Rapid gas leak valve integrated into off line to simulate effusion processes through target and ion source systems

Upgrade of RILIS lasers at ISOLDE

Two dye lasers were applied at 1st step of excitation - x 2.2

More power could be delivered to HRS target at the 2nd step of excitation

Ga ion beam has been produced with the SSL

Diode Pumped Solid State Nd:YAG Lasers as replacement of Copper Vapor Lasers:

Green Beams 45 W @ 511 nm

Yellow Beams 35 W @ 578 nm

CVL

Green Beams 92 W @ 532 nm

UV Beam 18 W @ 355 nm

IR Beam 45 W @ 1064 nm

SSL15 ns @ 11 kHz 8 ns @ 10 kHz

CVL 2

DL2

11

SSL 2

DL2

11

46%54%46%

Improvement of ionization efficiency by SSL :

And CVLs are still available for runs …

Total all parts of project

Staff MaterialFTE kCHF

1a LINAC prototyping and cryo design 5.5 4251b LINAC 3.0 - 5.5 MeV/u 25.5 6,8881c Linac 5.5 - 10 MeV/u 19.0 3,3501d LINAC lower energies 9.5 1,3251e Beam lines for experimental area 1.0 5002 REX trap and charge breeder 12.1 2,2383 TS consolidation 2,000

REX UPGRADE 72.6 16,7264 Targets & Front-ends 25.8 8,1005 PSB 900 ms 9.0 2,000

PROTON DRIVER BEAM 34.8 10,1006 RFQ cooler 0.0 5007 RILIS upgrade 0.0 2,4008 High-charge state beams 1.1 8009 New HRS 0.8 1,100

BEAM QUALITY 1.9 4,80010 Radiation protection consolidation 1.0 75011 Vacuum consolidation 8.5 2,408

CONSOLIDATION 9.5 3,158TOTAL 118.8 34,784Total MaterialTotal Personnel

Swiss Francs

Still required

34,78410,000

HIE-ISOLDE: Where are we?

• External grant from Belgium– 1 engineer post – Matteo– 1.3 MCHF for R&D on SC linac

• Second grant from Belgium approved for both physics programme and SC linac construction for HIE-ISOLDE

– 2.7 MCHF (540 kCHF per year for 5 years) for the SC linac construction

• WP in EUCARD proposal for R&D on thin film techniques– 1.5 MCHF in total budget (30% from EU)– 500 kCHF for HIE-ISOLDE relevant items (30% external)– Partners should be: IPJ-Polen, CI, LNL-INFN, IN2P3-IPNO, DESY

• Proposal in the UK to finance SC linac development and construction• RFQ cooler WP and RILIS WP financed and (almost) completed• Statement of Interest for proposal in the US to develop new high

intenity EBIS/T for HIE-ISOLDE, FRIB, HRIBF and ISAC-II– Support letter ISC and ISOLDE

• UK Phd Student and Post-doc starting at ISOLDE in July • Pre-study of new remote handling system in Finland, Univ. of Tampere• Discussions with CERN Mgt on CERN contribution.

HIE-ISOLDE: Where are we?

Staff Material Staff MaterialFTE kCHF FTE kCHF

1a LINAC prototyping and cryo design 0.0 425 5.51b LINAC 3.0 - 5.5 MeV/u 25.5 2,416 4,4721c Linac 5.5 - 10 MeV/u 19.0 3,3501d LINAC lower energies 9.5 1,3251e Beam lines for experimental area 1.0 0 5002 REX trap and charge breeder 12.1 2,2383 TS consolidation 2,000

REX UPGRADE 67.1 11,754 5.5 4,9724 Targets & Front-ends 25.8 8,040 605 PSB 900 ms 9.0 2,000

PROTON DRIVER BEAM 34.8 10,040 0.0 606 RFQ cooler 0.0 0 5007 RILIS upgrade 0.0 0 2,4008 High-charge state beams 1.1 8009 New HRS 0.8 1,100

BEAM QUALITY 1.9 1,900 0.0 2,90010 Radiation protection consolidation 1.0 75011 Vacuum consolidation 8.5 2,408

CONSOLIDATION 9.5 3,158 0.0 0TOTAL 113.3 26,852 5.5 7,932Total MaterialTotal PersonnelPHASE I 27.5 5,591 5.5 7,932Total Material Phase ITotal Personnel Phase I 2,778

Swiss Francs

Still required Received

34,78410,000

13,523

HIE-ISOLDE R&D status

Work has started on the main work packages, namely Cavity RF design, cavity manufacturing, cryomodule design, cryogenic system design and beam dynamics. Preparatory work on other work packages has started, we are still in line for the delivery of the Technical Design Report by end 2009.

High QWR with beam port corrected for steering effect

Sputtering chamber