JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

User Tools

Site Tools

Trace:
group_5

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
group_5 [2018/09/13 16:18]
flowerdew 		group_5 [2018/09/14 09:13] (current)
surbrook
Line 11: Line 11:
  
 {{group5_screen_shot_2018-09-10_at_15.03.08.png }} {{group5_screen_shot_2018-09-10_at_15.03.08.png }}
 +
  
 Question 4: Question 4:
  
   * Used website to calculate θ<sub>max</sub> and ΔE/E   * Used website to calculate θ<sub>max</sub> and ΔE/E
-    ** Opening angle = 10 mrad which is less than the θ<sub>max</sub>=25 mrad so we're good. \\  +    ** Opening angle = 0.59 deg = 10 mrad which is less than the θ<sub>max</sub>=25 mrad so we're good. \\  
-    ** ΔE/E = ~2% which is less than the 3.1% threshold so this also works.\\ +    ** ΔE/E = (12.083-11.593)/(12.083+11.593) ~2% which is less than the 3.1% threshold so this also works.\\  
 + 
 +{{:eandangle15oalpha.png?400|}} 
  
 Question 5: Question 5:
  
-  * <sup>15</sup>O + α reaction plays a role in the ignition of type I x-ray bursts on accreting neutron stars \\ +  * Proton capture on <sup>15</sup>O one might expect from rp-process conditions is halted by the short half-life of <sup>16</sup>F (40 keV) and its proton emission back to <sup>15</sup>O. The two minute half-life of <sup>15</sup>O further acts to limit transitions out of <sup>15</sup>O, making <sup>15</sup>O a waiting point in nucleosynthesis in this mass region. \\ 
 +  * <sup>15</sup>O + α reaction plays a role in bypassing this waiting point in the ignition of type I x-ray bursts on accreting neutron stars, but the cross-section at relevant temperatures/energies has been experimentally inaccessible to date. The next generation recoil separators, St. George at Notre Dame and SECAR at NSCL/FRIB may reach sensitivity to this important reaction. \\  
  
 Question 6: Question 6:
Line 29: Line 35:
  
 {{emittanceexample7.png}} {{emittanceexample7.png}}
 +
  
 Question 7: Question 7:
Line 42: Line 49:
 {{Group5_screen_shot_2018-09-13_at_15.48.23.png }} {{Group5_screen_shot_2018-09-13_at_15.48.23.png }}
  
-  * This optimisation improved the mass resolution from 640.86349 to 724.66207, while still focusing. {{:group5_screen_shot_2018-09-13_at_15.48.23.png?400|}}+  * This optimisation improved the mass resolution from 640.86349 to 724.66207, while still focusing.  
 + 
 + 
 +Question 8: 
 + 
 +  * Tolerance for the beam size was found to be 0.00075 +/- 0.00004 m 
 +  * Tolerance for the beam position was found to be +/- 0.007 m 
  
/srv/thewikis/JIOSS/data/attic/group_5.1536869919.txt.gz · Last modified: 2018/09/13 16:18 by flowerdew

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
CC Attribution-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki