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modes_of_operation [2013/10/17 21:30] pereira |
modes_of_operation [2017/03/03 20:41] pereira [Focus Mode] |
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===== Focus Mode ===== | ===== Focus Mode ===== | ||
- | In the focus mode, the maximum momentum acceptance is achieved (±2%) by making the analysis line achromatic | + | In the focus mode, the maximum momentum acceptance is achieved (±2%) by making the [[Introduction# |
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===== Dispersion-matching Mode ===== | ===== Dispersion-matching Mode ===== | ||
- | In the dispersion-matching mode the whole system (analysis line + spectrograph) is achromatic in the focal plane (see [[Fig. xxx]]). The analysis line has a 2D focus (in the dispersive //x// and non-dispersive //y// directions ) in the target point and has a high dispersion of about 11 cm/%, limiting the momentum acceptance to ±0.5%. The intermediate image plane has also a 2D focus and a dispersion of 1.5 cm/%. This mode provides the highest possible energy resolution (1 part in 5000 for a 1-mm wide beam spot), since it does not require momentum tracking. | + | In the dispersion-matching mode the whole system ([[Introduction# |
+ | Please, be aware that in this configuration, | ||
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===== Monochromatic Mode ===== | ===== Monochromatic Mode ===== | ||
__The monochromatic mode is still in development stage__. The motivation is the production of low-energy (5-10 MeV) secondary beams from a high-energy fragmentation beam. The implementation of this mode requires the use of a mono-energetic wedged installed in the intermediate image station. The wedge profile must be built on a case-by-case basis, considering the specific energy and nuclei in the experiment. | __The monochromatic mode is still in development stage__. The motivation is the production of low-energy (5-10 MeV) secondary beams from a high-energy fragmentation beam. The implementation of this mode requires the use of a mono-energetic wedged installed in the intermediate image station. The wedge profile must be built on a case-by-case basis, considering the specific energy and nuclei in the experiment. | ||