Grant: Subatomic Physics Envelope - Project

TUDA is a facility at TRIUMF/ISAC to detect charged particles emanating from reactions of radioactive beams with a stable isotopic target. The original facility was set up in collaboration with a group from the U. of Edinburgh (the U. of York joined later) and a group at TRIUMF. All detectors and most of the equipment for these experiments were provided by the British part of the group. We are seeking funds to continue and contribute to this collaboration. Many of those experiments still need execution due to a lack of radioactive beams. However, ^18Ne beams have been promised for the next year and we hope to recommence our vigorous program. It has now, however, become abundantly clear that the Canadian part of the TUDA group needs to be in possession of our own (silicon) detectors, as experiments are proposed that do not include the British members. Detectors have only a finite lifetime and can be easily damaged. Thus the British part of the group does not wish to risk their detectors for experiments in which they are not involved. However, the British group has agreed to usage of the more durable parts of the facility. While we were able to acquire some smaller detectors (S2) from other grants, we request the acquisition of one 1 mm thick LEDA type detector. This will be used for TRIUMF Experiments 1057 and 1110 as well as future experiments. Without such a detector, these experiments approved by the EEC cannot be done. In particular, as E1110 will be conducted at ISACII thick silicon detectors are needed. Our data acquisition computer, provided by Ediburgh, is now 7 years old and is unreliable and needs replacing. Our oil based roughing pump contaminates our vacuum and cryopumps with hydrocarbons, and must be replaced with a TRIUMF standard oli free scroll pump. The TUDA group employs a resarch associate. As TUDA experiments start up, it is essential that this postdoctoral position be maintained. We are quite encouraged by the referee's report to our grant request of two years ago that rated our presentation as excellent and worthy of support. We would like to act on the referee's recommendation.