Core group for prospective study ganil 2015
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Core Group for Prospective Study GANIL 2015

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Core Group for Prospective Study GANIL 2015

Core Group: Nicolas Alamanos, Giacomo de Angelis, Bertram Blank, Angela Bracco, Peter Butler, Fadi Ibrahim, Bill Lynch, Tohru Motobayashi, Gerda Neyens, Chistina Trautmann, Dominique Vernhet, Cristina Volpe, Ani Aprahamian, Muhsin Harakeh, Philippe Chomaz, Patricia Roussel Chomaz, Sydney Gales, and Marek Lewitowicz

Cluster coodinators: Stéphane Grévy, Abdou Chbihi, Bruno Piquet, Riccardo Raabe, Gilles de France, Maurycy Rejmund, Jean-Charles Thomas, Navin Alahari, Emmanuel Balanzat

Forward Look Forum (chaired by Bertram Blank)

Technical Advisory Board (chaired by Frédéric Chautard)

April 16Core GroupParis

June 10Open MeetingGiens

June 23Core GroupParis

August 29Core GroupParis

October 23-24Open MeetingCaen

Nov 21Core GroupParis

Dec 4 meeting on fragmentation beamsCaen

Jan 29 meeting on separator/spectrometerCaen

Feb 16Core Group + cluster cordinatorsParis

March 2Core Group + SC + SP2-SACCaen

March 9Open MeetingCaen

Prospects for GANIL 2015

GANIL presently offers unique opportunities in nuclear physics and many other fields:

by providing low-energy stable beams, fragmentation beams and re-accelerated radioactive species;

through the availability of a wide range of state-of-the-art spectrometers and instrumentation

With the construction of SPIRAL2 over the next few years, GANIL is in a good position to retain its world-leading capability

It faces strong competition from upgraded ISOL and fragmentation facilities

Underlying theme of report

IN 2015 GANIL should prepare to be the world-leading ISOL facility

Existing instrumentation – spectrometers, separators and detectors - should accommodate the intense neutron-rich beams from SPIRAL2

The repertoire of radionuclides from SPIRAL1 should also be enlarged

In addition to LINAG, the present GANIL facility has a niche energy regime (~ 50 MeV/u) for intermediate energy physics


A large and interesting physics programme has been achieved using SPIRAL1

The main limitation of SPIRAL1 is the small number of elements available; insertion of new sources is difficult in the present configuration

The modifications needed for the insertion of a charge breeder should be included in the safety file, with sufficient human resources in order to achieve this major improvement

Laser ion sources at SPIRAL1 should be included in the file but their construction is second priority


Note from TAB report:

“Second irradiation station is important for both SPIRAL1 and SPIRAL2

Could use existing target station D2 (SIRa and SPIRAL1 Cave)”


Present limitations on permitted beams for LIRAT have to be overcome, particularly in the view of the use of SPIRAL1 for providing radioactive ions for DESIR.

Authorisation for extracting all SPIRAL1 beams for LIRAT should be obtained.

Fragmentation studies: LISE and SISSI

SISSI should not be replaced by an identical SISSI2:

not internationally competitive in 2015

concentrate on SPIRAL2

A detailed study should be initiated that considers upgrading the LISE2000 beam line with a velocity filter and a magnetic spectrometer

Fragmentation studies: the future

This study should take advantage of related activity carried out within the EURISOL Design Study

The community has enthusiastically endorsed the proposal for a new 100-150 MeV/nucleon post-accelerator that will allow fragmentation of neutron-rich fission products.

This is outside of the scope of GANIL 2015

Nevertheless, GANIL should launch a preliminary, conceptual design study of a new post-accelerator that does not commit significant resources.

Zero-degree studies I

It is essential that there is provision of spectrometers/ separators for the study of reaction products, induced by SPIRAL2 beams, emitted at or close to the beam direction

Detailed studies to allow the high intensity beams of SPIRAL2 into specifically identified caves have to be carried out, and for that purpose a working group should be nominated

Zero-degree studies II: LISE

The velocity filter of LISE separator has been extensively used for fusion-evaporation reactions:

implies a modification of the velocity filter - man-power intensive and not compatible with high beam intensities

The detailed study that considers the enhancement of LISE for fragmentation studies should incorporate a parallel study for use for zero-degree operation with high-intensity RIB

Zero-degree studies III: SPEG

The long-term usefulness of this instrument arises from its excellent performance and its versatility for different types of measurements

In future SPEG will use beams from SPIRAL1, SPIRAL2 for measurements of inelastic and transfer reactions in inverse kinematics (and stable beams for material science)

all the changes to the focal plane detector setup, required to perform reaction measurements with beams from SPIRAL1 and SPIRAL2 should be implemented

Zero-degree studies IV: VAMOS

Should accommodate large angle operation

VAMOS has been successfully used for:

(i) fusion reactions using stable or RIB beams

(ii) transfer reactions in inverse kinematics using RIB

(iii) multi-nucleon transfer using heavy stable beams

VAMOS has to be ready for zero-degree operation (fusion evaporation and inverse-kinematics transfer) studies using intense SPIRAL2 beams

Improvements to the existing Wien filter and a detailed study of a beam dump with a separate permanent beam-line are required


High-resolution -ray spectroscopy with a Ge detector array is a very important part of the scientific programme of GANIL and SPIRAL2.

The electronics should be renewed, funded by the international collaboration. As second priority the available number of Ge detectors should be increased.


The availability of a 4 detector with excellent isotopic and energy resolution enables sensitive studies of the isospin dependence of nuclear matter and its equation of state.

It is important to complete the PHASE I - PHASE IV FAZIA implementation plans.These require the commitment of the international collaboration that will construct the device


GANIL provides energetic heavy ions and facilities for experiments in the fields of atomic physics, materials and condensed matter research as well as radio-biology and radio–chemistry.

For material sciences: chopper relocation and intensity modulation

For radiochemistry: reliable operation of pulse suppression

For radiobiology: improving the beam stability

For atomic physics: installing an analyzing magnet

GANIL management is encouraged to keep allocating beam access to industrial users and to study the possibility of providing cocktail beams

Beams (Forum and SPIRAL2 LoI)

Next steps

Final meeting of Core Group 23rd March

Submission to Scientific Council and SPIRAL2 SAC

Council meets in June

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