[Dlsupport] [ 1339] scattered beam envelopes in recovery transport

[David Douglas]

horizontal  axis is distance along the machine in meters

vertical axis is +/-5 sigma beam envelope in m for beam scattered 
(single event) at each of 15 slices along the target; the various curves 
(alternately red and blue) show effect of finite target length.

dashed lines are vacuum chamber walls - horizontal (blue), vertical 
(yellow/orange).

To calibrate, we have at time seen losses in places with 5 cm bore and 1 
mm sigma, so the fill factor is (very) large...



On 5/18/2016 2:54 PM, Glenn Randall wrote:
> What are the units on this?  And where exactly is 0 on the x-axis?
>
> On Wed, May 18, 2016 at 9:22 AM, David Douglas <douglas at jlab.org 
> <mailto:douglas at jlab.org>> wrote:
>
>     here are plots of the horizontal (top) and vertical (bottom) 5
>     sigma envelopes with scattering. Dotted lines are horizontal
>     (blue) and vertical (yellow) aperture.
>
>     I heated the beam up enough to give about 250 ppm loss in the
>     Moller dump, and worked the recovery match to try to fit through
>     the back end of the machine.
>
>     Anyone remember how far the HOM probes stick into the F-100
>     aperture? I recall it as either 47 or 43 mm diameter aperture
>
>     This is going to be interesting...
>
>     DD
>
>
>
>
>
>
>     On 5/17/2016 2:36 PM, Stephen Benson wrote:
>>     I have attached a release version of the spreadsheet that lists the elements in the 4F line during the DarkLight run.  The philosophy of this experiment is to use existing equipment wherever possible.  We will be using skew quads and supports from the 3F line and the last few girders of the UV line (8F region).  Column C is the position along the beam line.  The number of significant figures indicate how well we care about the position.  Those with 5 sig. figs. need to be aligned to the typical 250 um accuracy.
>>     Column D is the new nomenclature for the setup.  The color indicates the system (red is magnets, blue is vacuum, and green is I&C).  Column G is the old location of the element.  The color code is
>>     green - No modifications,
>>     gold - moved but not modified, and
>>     red - modified or new.
>>     Pay attention to the comments in column H.  They provide more detail. Let me know if you have questions or notice any errors.
>>
>>     Steve Benson
>>
>>
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>
>
>     _______________________________________________
>     DarkLight mailing list
>     DarkLight at mit.edu <mailto:DarkLight at mit.edu>
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>
>

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