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Re: magnet design



Jim Stewart wrote:
PS Richard - Has GlueX defined its coordinate system?
HERMES uses z along the electron beam, y up, and x to the left looking along the beam.

Yes.  The tagger hall origin is at the intersection of the nominal photon beam axis with the entrance surface of the crystal.  The Hall D origin is at the intersection of the nominal photon beam axis with the plane coincident with the upstream surface of the first coil of the solenoid.  The z axis points along the beam, the y axis points up, and the x axis is yhat cross zhat.  These were hashed out around the year 2001, as I recall.

Richard Jones