Bubble Chamber Beam Test September 2015

From Ciswikidb
Revision as of 19:01, 3 September 2015 by Suleiman (talk | contribs)
Jump to navigation Jump to search

Run Plan

  • Chamber is filled with natural N2O


  • Cross sections:

The cross sections are shown in the following figure:

CrossSections.gif

  • Expected rates:

The expected rates are calculated with 3 cm cell thickness and thin radiator.

  • The expected rates are shown in the following figure:

GNaturalN2O.gif

  • The expected rates from oxygen isotopes are shown in the following figure:

GNaturalO.gif

  • Run Plan:
  • Suppression of 14N(γ,p)13C events:
  1. Determine an initial pressure and temperature with no beam
  2. Start with beam at K.E. 6.5 MeV
  3. Increase beam K.E. by 0.2 MeV steps all the way to 8.5 MeV
  4. Reproduce the overall rate shown above
  5. At K.E. of 8.5 MeV, increase the chamber threshold by increasing the pressure. Suppress the 14N(γ,p)13C events.
  6. Once 14N(γ,p)13C is suppressed, the rate should drop by three orders of magnitude
  • Measuring rates from 18O(γ,α)14C:
  1. Now the chamber is at a new pressure
  2. Start with beam at K.E. 6.5 MeV
  3. Increase beam K.E. by 0.2 MeV steps all the way to 9.2 MeV
  4. Reproduce the overall rate shown above