1. |
|
|
2. |
- Bargholtz, Chr., et al.
(författare)
-
Properties of the WASA pellet target and a stored intermediate-energy beam
- 2007
-
Ingår i: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 587:2-3, s. 178-187
-
Tidskriftsartikel (refereegranskat)abstract
- Experimental data from the reaction close to threshold have been used to investigate time-dependent properties of the WASA pellet target and the stored beam of 892.8 MeV protons in the CELSIUS accelerator. The detection of 3He ions in solid-state detectors provides an excellent almost background free trigger for η production. Pellet interactions with the surrounding material and with the beam lead to evaporation of deuterium gas into the beam pipe. Approximately 30% of the registered η decay events are due to interactions in deuterium gas outside the pellets. Due to beam–target interaction the beam is transversely heated and appears to acquire a component of a slightly lower energy.
|
|
3. |
- Bargholtz, Chr, et al.
(författare)
-
Tagging of η mesons using the pd → 3Heη reaction near threshold
- 2006
-
Ingår i: Instruments and experimental techniques (New York). - : Springer. - 0020-4412 .- 1608-3180. ; 49:4, s. 461-467
-
Tidskriftsartikel (refereegranskat)abstract
- A zero-degree spectrometer for tagging η mesons on the CELSIUS/WASA facility is described, and its characteristics are presented. Tagging of η mesons is performed by detecting 3He ions produced by reaction pd → 3Heη close to the production threshold. The low background level (<2%) is in good agreement with the data obtained earlier on the SATURNE accelerator.
|
|