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 16 Core Group Paris
June 10 Open Meeting Giens
June 23 Core Group Paris
August 29 Core Group Paris
October 23-24 Open Meeting Caen
Nov 21 Core Group Paris
Dec 4 meeting on fragmentation beams Caen
Jan 29 meeting on separator/spectrometer Caen
Feb 16 Core Group + cluster cordinators Paris
March 2 Core Group + SC + SP2-SAC Caen
March 9 Open Meeting Caen
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
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.
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
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.
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
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
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
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
Final meeting of Core Group 23rd March
Submission to Scientific Council and SPIRAL2 SAC
Council meets in June