I am dizzy also...... :-)
Tim
Richard Jones wrote:
Yang,
I don't know how to use the "effective field boundary" as a definition
for the origin. It keeps me running in the following circle.
- Where exactly is the effective field boundary? I need a map to
know, go to 2.
- Where is the origin of the map? I need a coordinate system to
know, go to 1.
Please rescue me, I am getting dizzy! Can you tell me relative to
something I know, like the position of the crystal on the beam axis?
Richard Jones
Guangliang Yang wrote:
009801c9128e$3be0e420$372dd182@physics.gla.ac.uk">Dear
Richard,
The intersection of the photon beam trajectory and the effective
field boundary of the magnet is the location of the origin in my Tosca
simulation.
Now I am doing final Tosca calculation for the single magnet
tagger. I will send you the map you requested once I finish it.
Cheers
Yang
----- Original Message ----- From: "Richard Jones"
<richard.t.jones@uconn.edu>
To: "Yang Guangliang" <y.guangliang@physics.gla.ac.uk>
Cc: "Hall D beam working group" <halld-tagger@jlab.org>
Sent: Tuesday, September 09, 2008 3:12 PM
Subject: request for coordinates
Yang,
Can you tell us your convention for the coordinate system you are using
in the Tosca plots in your report? We are trying to locate the
microscope in the tagger hall coordinates, and we are not sure where
your origin is. You might add a sentence in your report giving this
information, and also the coordinate system orientation which seem to
be different from the one we are using to describe the tagger hall
geometry in the simulation and drawings. For the moment, we just need
the location of the origin, if you could forward those to us.
As soon as possible, it would be great to get a new field map from you.
The grid you used for the map of the two-dipole design would be fine.
thanks,
Richard Jones
|