Agenda

• TOP 1: Status Reports
• TOP 2: Discussion: Buffer gas cooling in RF coolers
• TOP 3: Open discussion: Design and construction of RF coolers
• TOP 4: Final discussion: What did we learn, how to improve the working group...
• TOP 5: List of participants (with e-mail addresses)

• Juha Aysto: Physics applications of the JYFL cooler
• Arto Nieminen: Status Report on the design of the JYFL cooler
• Paul Van den Berg: The sextupole ion guide at LISOL/ Leuven
• Jens Dilling: Status Report on the ISOLTRAP RF cooler
• Sylvain Henry: Status Report on the MISTRAL beam cooler
• Jürgen Ott: Status Report on the SHIPTRAP RF ion guide
• Friedhelm Ames: REXTRAP

• Bob Moore: General remarks on buffer gas cooling (document available as WORD 6-file soon)
• Dietrich Beck: Buffer gas cooling in traps

• David Lunney pointed out the three common features in all RF coolers:  Injection, cooling and extraction. Where cooling and extraction can be seen as rather straight forward. The injection side is more critical as seen at the existing Paul trap at ISOLTRAP. What kind of diagnosis is available right behind the entrance hole ? Possible to use RFQ with DC as read out ? The Orsay approach is to play with their 10 keV beam and develop an injection part.
• Juha Aysto is planning to build the injection side in their beam line and test it with stable isotopes (e=3pmm mrad, E=40 keV). Plan to use standard detectors (e.g. MCPs) and a laser.
• Jürgen Ott has an ion source in Munich for the REXISOLDE accelerator test stand, which could be used.
• Stefan Schwarz mentioned that the acceptance for the Paul trap system got worse with a grid at the entrance hole (Orsay idea).
• Idea to simulate a simple problem with all different existing codes and compare the output.
• Need for a 'bad emittance' ion source for acceptance tests ( GANIL's ECR might be possible ?)
• Frank Herfuth reported on the controlling system, which might be of interest for all groups. Combination of Siemens ProfiBus system with LabView 5. There will be a Workshop at CERN May 5.-6. 1998 concerning this task.
• Bob Moore explained the idea of the resonance circuits with power amps and ferrite cores plus resistor chains inside the vacuum chamber.

Good News:

• Juha Aysto announced the official start of the EXOTRAPS network (1.April 1998)

• Next meeting of the working group : Collaboration Meeting together with EXOTRAPS and EUROTRAPS in  Lisbon / Portugal    27. Oct.- 1.Nov. 1998.
• Planned Europhysics Conferences: Mainz / Germany 19.-24. Sep.1999 and Cargese /Corse 17.-21.Sep.2000.

• Need to check on simulations.
• Important to use the internet (EXOTRAPS homepage in preparation by Arto).
• Newsletter / newsgroups: responsible Dave.
• Subgroup for controlling system (workshop is already set up by Frank).
• Ion source from McGill will be sent to ISOLDE soon, and can be put in the beam line.
• Beam diagnosis workshop (in preparation by the Munich group, Jürgen Ott)
• Working group meeting for purification and flow pattern (in preparation by the Leuven group).
• Important to improve the personal contact for students (short-term visits).

• Munich: Oct.-Nov. 1998
• Orsay: Oct.-Nov. 1998
• Leuven: Sextupole works, injection for Penning trap ??
• ISOLTRAP: July 1998
• Mainz: Quadrupole works
• JYFL: Winter 1998
• REXTRAP: In Preparation.

 

Friedhelm Ames	Friedhelm.Ames@CERN.CH
Juha Aysto	Aysto@jyfl.jyu.fi
Dietrich Beck	Dietrich.Beck@fys.kuleuven.ac.be
Fritz Bosch	F.Bosch@GSI.DE
Jens Dilling	J.Dilling@GSI.DE
Achim Dretzke	Dretzke@kph.uni-mainz.de
Sylvain Henry	Henry@csnsm.in2p3.fr
Frank Herfurth	Frank.Herfurth@CERN.CH
Jürgen Kluge	J.Kluge@GSI.DE
Yuri Kudryavtsev	Yuri.Kudryavtsev@fys.kuleuven.ac.be
David Lunney	Lunney@csnsm.in2p3.fr
Rido Mann	R.Mann@GSI.DE
Bob Moore	Moore@physics.mcgill.ca
Arto Nieminen	Armani@tukki.jyu.fi
Jürgen Ott	Juergen.Ott@physik.uni-muenchen.de
Wolfgang Quint	W.Quint@GSI.DE
Michael Sewtz	Sewtz@kph.uni-mainz.de
Jerzy Szerypo	Jerzy.Szerypo@CERN.CH
Paul Van den Berg	Paul.Vandenberg@fys.kuleuven.ac.be
Ludo Vermeeren	Ludo.Vermeeren@fys.kuleuven.ac.be