From edgar@head-cfa.harvard.edu Fri Dec 20 18:28:35 1996
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To: gaetz, dj
cc: edgar
Subject: quad shutter axial positions
Date: Fri, 20 Dec 1996 18:28:33 -0500
From: "Richard J. Edgar" <edgar@head-cfa.harvard.edu>
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I still don't know where the drawings of the quad shutters are;
presumably Jon can rustle some up here, or get some from Kodak.
But here's the info about the axial positions.  There are photos
of the aft HRMA structure on page 

	http://hea-www.harvard.edu/asctrw/pix_hetg_install.html

on the WWW.  They show which corner has the hinge, which way
opening shutters rotate (with angular momentum vector parallel to
the x-ray propagation direction; our Z axis).

					good luck;
					Dick

------- Forwarded Message

Date:    Fri, 22 Sep 1995 14:45:54 -0500
From:    maj@kodak.com (Mike Johnston)
To:      jwa@amelia.sp.trw.com
cc:      vallimont%vxcnsa@vxcnsa.ias.kodak.com, edgar@head-cfa.harvard.edu,
	 edgar@head-cfa.harvard.edu
Subject: Re: XRCF configuration question

Jon,

John didn't realize that we were looking for fairly accurate numbers and
the ones in the table below are in fact the distances to the -X side of the
Y-axis shutters.  The Z-axis shutters are 0.375" in the +X direction from
the Y-axis shutters.  These numbers are nominal dimensions and the actual
tolerance between the blades and the CAP midplane is in the order of +/-
0.250".  Also, note the typo for MP6; it's 118.25".


>X-Sender: jwa@amelia.sp.trw.com
>X-Mailer: Windows Eudora Version 2.0.3
>Mime-Version: 1.0
>Date: Thu, 21 Sep 1995 15:29:59 -0700
>To: "Richard J. Edgar" <edgar@head-cfa.harvard.edu>
>From: jwa@amelia.sp.trw.com (Jonathan W. Arenberg)
>Subject: Re: XRCF configuration question
>Cc: jph@cfa.harvard.edu, maj@Kodak.COM
>
>Hi Dick
>
>I have some more quantitative data for you re: your question.The axial
>distance in inches between the HRMA midplane and the shutter for the various
>mirror pairs is given below:
>
>MP1     125.00 in
>MP3     122.75 in
>MP4     120.50 in
>MP6     188.25 in
>
>Please let me know if you are in need of more data.
>
>Regards,
>
>Jon
>
>>
>>John,
>>
>>I'm working with Jack Hughes at SAO, doing ray-trace models of the AXAF
>>telescope.  In an effort to simulate some focus tests to be done
>>at the XRCF in Huntsville, we started to wonder where, along the
>>optical axis, the quadrant shutters are placed.  Perhaps you can
>>refer us to an appropriate document or drawing, or just dig up a
>>number.  We generally measure things from either the front of the
>>HRMA paraboloid elements, or the Central Aperture Plate of the HRMA,
>>but any other fiducial point would do.
>>
>>Thanks for your attention.
>>
>>Dick Edgar
>>
>>
>>=============================================================================
>>Richard J. Edgar edgar@head-cfa.harvard.edu | "It all depends, of course,
>>Harvard-Smithsonian Center for Astrophysics | upon whether or not it depends
>>60 Garden St., MS 81, Cambridge, MA 02138   | or not, of course, if you take
>>phone: (617)495-7249; fax: (617)495-7356    | my meaning."  --John Woolley
>>
>>
>>
>******************************************
>Had I been present at the creation, I would have given some useful hints for
>the better ordering of the universe.
>
>                      -Alphonso the Wise. 1221-1284.
>
>
>


===================================================================
* Mike Johnston (MJ)      *                                       *
* -----------------       *  "The goal of every engineer is to    *
* AXAF Interface Engineer *  retire without getting blamed for    *
* Eastman Kodak Company   *  a major catastrophe."                *
* Ph 716-722-4138         *                         - Dilbert     *
* Fx 716-722-1155         *                                       *
* maj@kodak.com           *                                       *
===================================================================




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