The HIE-ISOLDE project at CERN

Y. Kadi on behalf of the HIE-ISOLDE project team

Outline The ISOLDE Facility- status The HIE-ISOLDE project A SC linac for Radioactive Ion Beams R&D activities Status of the project Prospect for International Collaboration

LINAC2

PSB

PS

ISOLDE

The ISOLDE facility

REX-ISOLDE Post accelerator

Users next requirements:

Higher energy for the post-accelerated beam More beams (Intensity wise and different

species) Better beams (High purity beams, low

emittances, more flexibility in the beam parameters)

=> Need for an upgraded facility : HIE-ISOLDE proposal

The HIE-ISOLDE Proposal The High Intensity and Energy (HIE) ISOLDE proposal builds on the success of the

REX-ISOLDE post accelerator and will focus on an upgrade of the REX facility but also aims to improve the target and front-end part of ISOLDE to fully profit from upgrades of the existing CERN proton injectors, e.g. faster cycling of the PS Booster, LINAC4 (10 kW) and later LP-SPL (30 kW)

The need in Europe of an upgraded ISOLDE facility was established in the NuPAC meeting in October 2005

The HIE-ISOLDE proposal was later presented to the Research Board in June 2006.

The proposal was reviewed by the SPC in 2007 and finally formed part of the 4th Theme Projects for which CERN requested an important external contribution

An R&D programme has been set up in 2008 (1.0 MCHF entirely financed from outside CERN) for starting the overall study and the R&D on superconducting high-beta cavities.

Following the workshop on the broadening of the physics landscape at CERN, which took place in May 2009, the Research Board in its September session approved the project.

Different reactions and Physics reach with the upgraded facility

Scope of HIE-ISOLDE

Energy Upgrade:The HIE-ISOLDE project concentrates on the construction of the SC LINAC and associated infrastructure in order to upgrade the energy of the post-accelerated radioactive ion beams to 5.5 MeV/u in 2013 and 10 MeV/u by 2014/2015

Intensity Upgrade:The design study for the intensity upgrade, also part of HIE-ISOLDE, starts in 2010, and addresses the technical feasibility and cost estimate for operating the facility at 10 kW once LINAC4 and PS Booster are online. The 30 kW option (SPL beam) will be studied at a later stage

HIE-ISOLDE SC-linac SC-linac between 1.2 and 10 MeV/u 32 SC QWR (20 @ b0=10.3% and 12@ b0=6.3%) Energy fully variable; energy spread and bunch length

are tunable. Average synchronous phase fs= -20 deg 2.5<A/q<4.5 limited by the room temperature cavity 16.02 m length (without matching section) No ad-hoc longitudinal matching section (incorporated

in the lattice) New beam transfer line to the experimental stations

HIE-ISOLDE LINAC - layout3 stages installation

1.2 MeV/

u

3 MeV/

u

5.5 MeV/

u

10 MeV/

u

8

MeV/u

QWR cavities (Nb sputtered)

Fundamental Beam Characteristics of the new SC Linac Facility

R&D activity RF – Beam dynamics studies High b cavity prototype

Copper substrate manufacturing Chemical etching Nb sputtering

RF sub-system prototypes Tuner Power coupler

SC solenoid prototype Cryomodule design New RF test stand for QWR at CERN

Surface treatment (dummy and real cavity)

From Bias to Magnetron sputtering

Bias Diode Sputtering:Outcomes:

• Unstable plasma: after 20-40 min the plasma disappeared from the outer part of the cathode. Non homogeneous distribution of the plasma.

Magnetron Sputtering:Outcomes:• Stable plasma• Improvements on the thickness• More homogeneous distribution of the

plasma between outside and inside

Cavity sputtered

Installation of the cavity in the cryostat

Test at TRIUMF

The Q- value is a factor 10 lower then nominal, Q-slope is also very steep. (LIMITING factor)

0 0.5 1 1.5 2 2.5 30.0E+00

1.0E+08

2.0E+08

3.0E+08

1234

Ea, MV/m

Qo

Cryomodule design

Features: Single vacuum cryostat Side loading of the cold masses Independent alignment of the cavities w.r.t. solenoid Heat shield cooled by He cold gas

HIE-ISOLDE Layout

HIE-ISOLDE Layout

New Beam Transfer Lines

Overall Current Cost Estimate

The current cost of HIE-ISOLDE is 39.7 MCHF materials and 175 FTE (105 Staff FTE+ 70 Fellows/Phd FTE)

This includes the beam quality improvement and part of the linac design study & prototyping costs (4.8 MCHF + 6 FTE) that have already been spent, and

necessary consolidation costs.

MaterialsMCHF

StaffFTE

FellowsFTE

Beam quality improvements 4 2

Prototyping, Linac up to 5.5 MeV/u 7.4 + 0.866 + 2 37 + 2

Infrastructure, Integration and Safety for 5.5 MeV/u 12.8

Upgrade Linac up to 10 MeV/u + new transfer line 10.3

13 0Upgrade infrastructure to 10 MeV/u 2.2

Design study for intensity upgrade 2.2 11 33

(29 CATHI)

HIE-ISOLDE Schedule

Important milestones for Energy Upgrade:•Start project Jan 1st 2010•Start construction by Jun 2010•Launch Procurement of Cryogenics equipment:

Market survey by Mar 2010 Tech. Specific. By May 2010 Finance Committee by Sep. 2010

•Cryogenics installed and commissioned Jun 2013•High energy beam line (5.5 MeV/u) installed by Oct 2013•10 MeV/u Linac installed by 2014/2015•Commissioning organized inline with L4 and PSB commissioning

Summary

Cryomodule conceptual design completed, detailed design already started

Preparation of test bench at CERN of QWR resonators (new test cryostat is planned to be ready by June 2010)

Complete new Cavity RF tests @ SM18 by the end of 2010.

2nd prototype cavity (slightly modified) in fabrication Tendering —> Building + Cryogenics, by Sep. 2010

finance Committee.

Status of HIE-ISOLDE Collaborations

K.U. Leuven – Belgium (Active) Cockcroft Institute, Liverpool and Manchester Uni. –

UK (Active) LNL-INFN – Italy (MoU) Spiral-2 – France (MoU) VECC & SAHA- INDIA (MoU) SKKU-Korea (MoU)

Thank you very much for your attention