Difference between revisions of "March 21, 2017 - Radio-isotope test"
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1. What energy or energy range do you want (is this total, kinetic), and if a range what step size or resolution is practically useful? | 1. What energy or energy range do you want (is this total, kinetic), and if a range what step size or resolution is practically useful? | ||
− | :'''We'd like to have kinetic energy at least 18 MeV, and under 18.5 MeV | + | :'''We'd like to have kinetic energy at least 18 MeV, and under 18.5 MeV (18.5 preferable), with a resolution (sigma) of at least 20 keV.''' |
− | [[media:170321_radioisotopeenergies.xlsx]] | + | ::[[media:170321_radioisotopeenergies.xlsx]] |
+ | ::[http://devweb.acc.jlab.org/CSUEApps/atlis/task/16363 4K Test of 0L02,0L03,0L04] | ||
+ | ::[[media:MOLPR010_proceedings.pdf]] | ||
2. How well do you need to know the mean energy of #1 (not energy spread), just mean energy? | 2. How well do you need to know the mean energy of #1 (not energy spread), just mean energy? | ||
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7. How much position jitter or instability is acceptable, this might be an important point? | 7. How much position jitter or instability is acceptable, this might be an important point? | ||
− | :'''3x3 mm''' | + | :'''From Pavel: 3x3 mm''' |
+ | :'''From George: 'Our sample is going to be about 2 mm larger that the beam (assuming Gaussian beam with sigma=3mm). So we can have a small position jitter of 1-1.5 mm, but more than that will mean we are missing the target.''' | ||
8. What is the beam intensity you will use at the energies in #1, is this cw or peak? | 8. What is the beam intensity you will use at the energies in #1, is this cw or peak? | ||
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10. What else? | 10. What else? | ||
− | :''' | + | :'''Joe Gubeli mentioned YAG Viewer on the target, so I think this is how we plan to monitor the beam position during the irradiation.''' |
Latest revision as of 13:24, 21 March 2017
Beam requirements
1. What energy or energy range do you want (is this total, kinetic), and if a range what step size or resolution is practically useful?
- We'd like to have kinetic energy at least 18 MeV, and under 18.5 MeV (18.5 preferable), with a resolution (sigma) of at least 20 keV.
2. How well do you need to know the mean energy of #1 (not energy spread), just mean energy?
- 20keV
3. Is energy spread an issue, and if yes - is this value similar to #2?
- Yes.
4. What is the beam spot size or aspect ratio you would like to have at the radiator, and if a limit is important or a range is desired, please say so?
- Under 3x3 mm sigma
5. How well do you need to know the beam size, aspect or profile, maybe this is an issue for your diagnostics?
- Accuracy of beam size and stability about 1 mm
6. How precisely do you need to set the beam position at the radiator, how will you do this?
- 1 mm, use the beam profile scanner just upstream
7. How much position jitter or instability is acceptable, this might be an important point?
- From Pavel: 3x3 mm
- From George: 'Our sample is going to be about 2 mm larger that the beam (assuming Gaussian beam with sigma=3mm). So we can have a small position jitter of 1-1.5 mm, but more than that will mean we are missing the target.
8. What is the beam intensity you will use at the energies in #1, is this cw or peak?
- 50 uA CW
9. Are there limits on how much beam or beam intensity can be used when setting up on the radiator, e.g. limit so not to contribute to your result?
- Pulsed beam if possible, at a reasonable intensity
10. What else?
- Joe Gubeli mentioned YAG Viewer on the target, so I think this is how we plan to monitor the beam position during the irradiation.