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Estimated Beam Rates at the Exit of AIRIS

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For 10 MeV/u primary beams (~8-9 MeV/u secondary beams). Rates can be uncertain up to an order of magnitude. For any questions or comments please contact Calem Hoffman.  

Table of rates:

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Parameters included in the rate estimations

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Primary Beam:

Energy - 10 MeV/u

Intensity - 1 particle-uA

Targets:

~2 mg/cm² average thickness [~10²⁰ atoms per cm²]

Assumed liquid film targets for proton and deuterons and solid rotating targets for Be and C

Cross Sections:

Integrated cross sections were estimated from experiment from DWBA calculations

Angular distributions were calculated using the code PTOLEMY

AIRIS Transmission:

Transmission through AIRIS was calculated for a number of specific cases using TRACK

Reaction kinematics, angular distributions, and recoil particle straggling were accounted for using LISE++ to generate the input particle rays for TRACK

The secondary beam transport was opitmized while ensuring suficient suppression of the unreacted primary beam

Smooth functions based on these data were determined for the different classes of reaction type e.g. (d,p), (d,n), +2n, +2p etc.

Estimated transmission values through AIRIS from detailed ion-optics calculations for a select number of reactions (data points). The solid lines are the adopted transmission functions for the specific reactions used in the global rates estimate calculations. 

Charge State Fraction:

Fully stripped ions (q=Z) were assumed

For 10 MeV/u primary beams, the fraction for Z < 9 is 1 (100% in the fully stripped charge state)

Above Z = 8, a linear extrapolation was applied to account for the <1 charge state fraction in the q=Z fully stripped ion

Rate Estimates from 2014 ATLAS Users's Meeting