Questionnaire
Some of the initial questions on experimental instruments and facility requirements that we are addressing are given below. Please send your opinions and insights into these issues to coordinator@ariaweb.org
1. Previous discussions of equipment for astrophysics measurements with low energy beams have identified two major components - a recoil separator optimized for capture reactions, and a scattering chamber for measurements such as (p,p), (p,p'), (p,alpha), and similar reactions. Is there a consensus that both of these major components are desired, and that they should have separate beamlines?
2. What experimental instruments (e.g., gas targets, focal plane detectors, gamma arrays) do you think are important to accompany the major components?
3. Do we have plans to use the sophisticated GRETA gamma ray detector system in the low-energy hall, or should a more modest array (e.g. NaI, BaF) be built? [GRETA info can be found at http://greta.lbl.gov]
4. Do you suggest the need for another beamline in this low-energy experimental hall? If so, what equipment would you install there? Would you advocate having an additional beamline available for a (to be determined) future use ?
5. What beam quality requirements are needed for our measurements? Such as, the maximum beam energy in the hall, as well as the energy resolution, masses and mass resolution, timing structure and resolution, emittance, spot size, halo, sensitivity to beam trips, sensitivity to intensity fluctuations?
6. What other requirements do you envision for the facility? Such as, floor space for the experimental hall, the need for an electronics hutch, data acquisition requirements, overhead crane access, beam line height, cooling systems?
7. What thoughts do you have regarding the design of a recoil separator? While this is somewhat beyond the scope of the upcoming workshop, the design of the recoil separator will be a major factor driving the required floor space for the experimental area. One could consider the DRAGON separator at TRIUMF / ISAC, or others (FMA, DRS, ARES, ERNA ...) as a straw man design. If so, what improvements and changes would you suggest to your favorite straw man? Alternatively, do you advocate the design of a new separator from scratch? How would your choice(s) impact the facility requirements?
8. What other comments do you have on an endstation for astrophysics measurements at RIA?