FIFTH MEETING FOR RFQ COOLER AND BUNCHER AT ISOLDE PROJECT

SIXTH MEETING FOR RFQ COOLER AND BUNCHER AT ISOLDE PROJECT

Present: T. Fritioff, A. Jokinen, M. Lindroos, S. Meunier, I. Podadera, D. Porret, F. Wenander

Vacuum layout:

The exhaust gases of the system are directed to ISOLDE exhaust line (not that of the target sector).
Most of the people is worried about the high pressure (2E-3 mbar) at the main pump (TP1), it’s very tight for the pump and it will be a problem if the pump after some period began to make noise (due to damage in the bearings). Ari comments that by experience it hasn’t appeared problems at the experiment in Jyväskylä.
Between insulators and for the flanges of the main pump and its valve, the flanges will be CF, due to we need to bakeout the system maybe with a temperature a bit higher that we could reach with Viton (for example), and we need a very clean system.
The standard for the rest of the beam line will be ISO-K DN 200.
It’s better to use Leybold pumps because nowadays there are a lot of problems to maintain Peiffer pumps at CERN. In addition, for control it’s easier to use Leybold pumps because it’s already done. An offer for the Leybold pumps Turbovac 1600C, Turbovac 1100C will be requested.
For the forepumps: Alcatel, models 2033H (30 m³/h) or the smaller model of 2015H (15 m³/h).
Sophie reminds that we should think about the weights of the pumps and valves, and if they fit into our system.
The kind of valves that we want to use for venting must be thought.
The procedure to apply for the vacuum system can be discuss later.

Others:

The extraction electrodes for the RFQCB must be designed, and Ari asked to either Fredrik or Tomas to help Ivan with Simion and design the system as it is similar to the extraction of the ion sources.

Next meeting 18-06-2003.