TSR@ISOLDE Workshop 2015

Contribution List

3. Welcome

Klaus Blaum (Max-Planck-Gesellschaft (DE))

27/04/2015, 14:00

Session 1

1. HIE-ISOLDE The Physics Case

Dr Maria J G. Borge (CERN)

27/04/2015, 14:10

Session 1

The high quality and selectivity of the ISOLDE beams allows high-precision measurements of nuclear structure phenomena. In the period of 2001-2012 ISOLDE offered the largest variety of post-accelerated radioactive beams in the world up to an energy of 3 MeV/u. In order to broaden the scientific opportunities, the HIE-ISOLDE (High Intensity & Energy) project will increase the final energy of...

4. STATUS OF THE HIE-ISOLDE PROJECT

Yacine Kadi (CERN)

27/04/2015, 14:35

Session 1

After 20 years of successful ISOLDE operation at the PS-Booster [1], a major upgrade of the facility, the HIE-ISOLDE (High Intensity and Energy ISOLDE) project was launched in 2010. It is divided into three parts; a staged upgrade of the REX post-accelerator to increase the beam energy from 3.3 MeV/u to 10 MeV/u using a super-conducting Linac, an evaluation of the critical issues associated...

5. TSR Status report

Klaus Blaum (Max-Planck-Gesellschaft (DE))

27/04/2015, 15:00

Session 1

The TSR will be the first low-energy storage ring at an ISOL-type radioactive beam facility [1]. Specifically, we intend to setup the heavy-ion, low-energy ring TSR at the ISOLDE facility in CERN, Geneva. Such a facility will provide a capability for experiments with stored secondary beams that is unique in the world. The envisaged physics programme is rich and varied, spanning from...

17. Status report of the charge breeder upgrade

Fredrik John Carl Wenander (CERN)

27/04/2015, 15:25

Session 1

The REXEBIS charge breeder provides the HIE-ISOLDE linac with highly charged ions such as 2< A/q<4.5. Only for lighter ions the low A/q-values can be obtained (fully stripped ions to reachable Z=20), partly because of the limited electron beam energy, but also due to the limited electron current density. As the electron cooling time is inversely proportional to the square of the ion charge,...

18. Novel internal target source for future storage ring experiments

Nikolaos Petridis (GSI Helmholtzzentrum)

27/04/2015, 16:20

Session 2

The introduction of cryogenically cooled, few micrometer-sized nozzle geometries and an essential modification of the experimental storage ring (ESR) target station for the first time allowed for a reliable operation using the light target gases helium and hydrogen at area densities up to values of 10$^{14}$ cm$^{-2}$ [1]. In the course of these optimization efforts, a remarkably versatile...

8. Feasibility of experiments at TSR@ISOLDE from the accelerator point of view

Manfred Grieser (MPI Heidelberg)

27/04/2015, 16:45

Session 2

Recently transfer-induced fission experiments where proposed at TSR@ISOLDE, requiring luminosities in the 1027 1/(s cm2) range. In the talk the feasibility of those experiments from the accelerator point and as well the achievable luminosity will be discussed. Furthermore experiments with the external spectrometer HELIOS needs ion beams with transverse emittances of about 0.01 mm mrad ...

9. In-ring detector systems

Philip J WOODS

27/04/2015, 17:10

Session 2

The talk will consider the types of high resolution measurements that could be performed with an in-ring silicon detector system on the TSR@ISOLDE, with a particular emphasis on nuclear astrophysics applications. Funding has now been obtained through the UK ISOL-SRS project to build this system, and the project has now begun.

0. Laser spectroscopy of recirculating beams at the TSR

Dr Thomas Elias Cocolios (University of Manchester (GB))

27/04/2015, 17:35

Session 2

Laser spectroscopy is an atomic technique, which gives access to nuclear observables independently of nuclear models. The hyperfine structure reveals the nuclear spin and nuclear electromagnetic moments, while the isotope shift between any two isotopes is related to the change in the nuclear mean square charge radius. There are limitations to laser spectroscopy related to the atomic system...

10. Status report on the TSR building

Erwin Siesling (CERN)

28/04/2015, 09:00

Session 3

Since last year a few iterations have been done on the TSR building. More detailed studies have been carried out on the handling, the crane inside the building and the necessary height of the building. Calculations were done on the construction itself taking the different weights of the machine and its elements in account. Integration of the power supplies and equipment for the machine and...

2. Status of the External Solenoidal Spectrometer for the TSR

Robert Page (University of Liverpool (GB))

28/04/2015, 09:25

Session 3

Injecting beams of radioactive nuclei into the TSR and cooling them will make it possible to perform charged-particle spectroscopy experiments with excellent energy resolution. For low-Z beam species, nuclear reactions in a gas-jet target can be studied in the ring, with the beam passing through the target repeatedly to achieve high luminosities. However, for heavier beam species higher...

11. In-ring decay measurements

Riccardo Raabe (KU Leuven (BE))

28/04/2015, 09:50

Session 3

Beta-decay is a well-established technique to investigate the structure of nuclei. In light exotic nuclei the decay is characterised by large Q-values and low breakup thresholds in the daughter nuclei, so that feeding to continuum states and delayed emission of nucleons and light ions become possible. These processes have been used to study the peculiar features of those systems, such as halos...

12. Fission studies at HIE-ISOLDE with the TSR

Beatriz Jurado (CENBG)

28/04/2015, 10:45

Session 4

Studies of nuclear fission in direct kinematics are limited by the availability of targets and the reduced velocity of the fission fragments, which makes their identification in charge rather complicated, in particular for the heavy fragment. Experiments in inverse kinematics carried out at GSI [1, 2] and GANIL [3] have strongly contributed to a revival of fission studies. The GSI experiments...

19. Atomic Physics Experiments with Multiply Charged Ions in TSR@ISOLDE

Andreas Wolf (Max Planck Institute for Nuclear Physics)

28/04/2015, 11:10

Session 4

With online radioactive beams or with a standalone ion source, and with a suitable injector, the TSR storage ring can be used to study multiply charged ions of many elements and in many charge states. This makes the storage ring a unique tool for studies at the borderline of atomic and nuclear physics, also serving astrophysics and fusion energy research. Recent achievements in this research...

14. Storage rings: present and planned

Yuri Litvinov (GSI, Darmstadt)

28/04/2015, 11:35

Session 4

In this presentation I will try to give an overview of the present and planned storage ring projects worldwide. I will concentrate on the planned research program and will discuss the unique as well as overlapping physics cases.

15. Cryring at GSI

Michael Lestinsky

28/04/2015, 12:10

Session 4

The former Swedish heavy-ion storage ring CRYRING has been shipped to Darmstadt as in-kind contribution to FAIR. We are presently in the progress of setting it up downstream of ESR. This enables a new access to stored highly charged ion beams at low energies for experiments on atomic and nuclear physics, their intersection and beyond. I will report on the present project status, summarize the...

16. Open discussion/Conclusions

28/04/2015, 12:35

Session 4