Difference between revisions of "2012AnnihCountrRateEstimate"

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Revision as of 17:18, 19 January 2012

Rate Estimates

Previous experiment at the IAC

052008PosProdApparatus.png 052008PosProdSignal.png 052008PosProdBackgrd.png
IAC apparatus for positron production experiment Counts observed when the dipole is tuned to direct positrons onto the Ta target Counts from electrons on Ta target
HpGe observed about 1 annihilation photon per 10 microCoulombs of electrons on the upstream Tungsten target
Ratio of annihilation photons observed when using positrons to electrons
Condition Grade Calculation
If all Homework is complete and Simulation project is turned in on time (50%) Homework + (50%)(Simulation Project)
If 1 homework set is incomplete or more than 48 hours late (60%)Homework + (40%)(Simulation Project)
Otherwise (70%)Homework + (30%)(Simulation Project)

NaI rate Ratio of positron to electron beam

Assumed Geometry

Assume a 2 mm thick Tungsten target that is 1" square

The target is located at -80 < Z < -80.2 The NaI crystal is 2.32" or 56.49 mm in diameter The NaI crystal is 8" from the target then the opening angle is atan(2.32/8/2) = 8.25 degrees


PePPO_2012Run