Changes between Version 7 and Version 8 of Research/Instrumentation/IonAcoustic/Meetings/2021/09/29


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Timestamp:
Oct 1, 2021 7:48:30 PM (3 years ago)
Author:
longkr
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  • Research/Instrumentation/IonAcoustic/Meetings/2021/09/29

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    33== Notes ==
    44
    5 JM 29/09/2021                   Ion Acoustic Imaging Meeting
    6 Present: Ben Cox, Emma Harris, Ken Long, John Matheson, Colin Whyte
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    8 Discussion
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     9  JM 29/09/2021
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     13**Present:** Ben Cox, Emma Harris, Ken Long, John Matheson, Colin Whyte
     14
     15__// Discussion: //__
    916KL described using an analytical approximation (Batfield 1997) to model the energy deposited by 15MeV protons in water and calculate the Bragg peak dimensions. Taking the speed of sound to be 1481 m/s then the time taken for a sound wave to travel the PFWHM is 50ns ( characteristic frequency 20MHz). BC commented that this fits with photoacoustic experiments in which the pulse length is near 10ns to ensure stress confinement. Compared to likely test beams, LhARA aims at 10-40ns bunch length, AVO uses 5-10ns bunches in a train, CERN or cylclotrons would be longer.
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