[Crater-team] CRaTER Side Shielding
Anthony Case
tonycase at cfa.harvard.edu
Thu Dec 6 14:36:39 EST 2018
Since we were discussing the possibility of side-penetrators yesterday, I
went back and looked at the solid model for the instrument to see how much
shielding is on the sides of the detectors. There are a couple images
attached. The outer wall of the telescope housing is 0.2 cm, and the added
shielding was essentially a C-channel with 0.2cm walls that was bolted onto
the outside of the telescope housing. So for normally incident particles
there is just the end-caps which are 0.076 cm (which gives us our usual
~10-12 MeV protons required to get into the instrument). And for
side-penetrators to get through a 0.4cm thick wall requires about 27.5
MeV. That neglects the detector frame, which could add another >0.5 cm.
Of course any particular particle's path through all of this junk is fairly
complex, but roughly speaking 30-50 MeV seems like the minimum energy a
side-penetrating proton would need to reach the detector.
[image: image.png]
[image: image.png]
---------------------------------------------------------------------
Anthony Case
Astrophysicist
High Energy Astrophysics Division (HEAD/SSXG)
Center for Astrophysics | Harvard & Smithsonian
Cell: (617) 304 0768
60 Garden Street | MS 58 | Cambridge, MA 02138
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/crater-team/attachments/20181206/bcb4fb2d/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 169579 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/crater-team/attachments/20181206/bcb4fb2d/image-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 154536 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/crater-team/attachments/20181206/bcb4fb2d/image-0003.png>
More information about the Crater-team
mailing list