mad35b_detenv

Useful information on beam dimensions for MAD detector builders

Information provided here refers to the MAD in its 35° minimum angle with 35° vertical bend configuration (MAD35b).

Last updated 7/25/02 -JJL

General overview:

Figure above shows the overall layout with >2000 random trajectories. Origin of the coordinate system is the target.

This figure shows the x-envelope in the region of the detectors. Endplanes (ep's) are shown.

ep 11: 1 meter from exit of 2^nd magnet
ep 12: 2 meters after ep 11
ep 13: 3 meters after ep 11
ep 14: 5 meters after ep 11

This figure is like the preceeding one except here the transverse (horizontal) envelope is shown. Endplanes are the same as in the previous picture.

ep 11 (1 m from magnet 2 exit)	Trajectory summary
ep 11 (1 m from magnet 2 exit)	x₀	q₀	y₀	f₀	x_f	q_f	y_f	f_f	l	d
max.	3.0E-03	2.0E-01	1.0E-01	6.1E-02	8.0E-01	1.8E-01	4.0E-01	1.7E-01	1.8E-01	1.5E-01
min.	-3.0E-03	-1.7E-01	-1.0E-01	-6.3E-02	-6.0E-01	-2.3E-01	-4.2E-01	-1.7E-01	-3.5E-01	-1.5E-01

ep 12 (2 m behind #2)	Trajectory summary
ep 12 (2 m behind #2)	x₀	q₀	y₀	f₀	x_f	q_f	y_f	f_f	l	d
max.	3.0E-03	2.0E-01	1.0E-01	6.1E-02	9.8E-01	1.8E-01	3.2E-01	1.7E-01	1.8E-01	1.5E-01
min.	-3.0E-03	-1.7E-01	-1.0E-01	-6.3E-02	-8.2E-01	-2.3E-01	-3.3E-01	-1.7E-01	-3.7E-01	-1.5E-01

ep 13 (3 m behind #2)		Trajectory summary
	x₀		q₀	y₀	f₀	x_f	q_f	y_f	f_f	l	d
max.	3.0E-03		2.0E-01	1.0E-01	6.1E-02	1.2E+00	1.8E-01	2.5E-01	1.7E-01	1.8E-01	1.5E-01
min.	-3.0E-03		-1.7E-01	-1.0E-01	-6.3E-02	-1.1E+00	-2.3E-01	-2.4E-01	-1.7E-01	-3.8E-01	-1.5E-01

ep 14 5 m behind #2	Trajectory summary
ep 14 5 m behind #2	x₀	q₀	y₀	f₀	x_f	q_f	y_f	f_f	l	d
max.	3.0E-03	2.0E-01	1.0E-01	6.1E-02	1.7E+00	1.8E-01	6.2E-01	1.7E-01	1.8E-01	1.5E-01
min.	-3.0E-03	-1.7E-01	-1.0E-01	-6.3E-02	-1.7E+00	-2.3E-01	-6.1E-01	-1.7E-01	-4.2E-01	-1.5E-01

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Please send comments or questions to John LeRose: lerose@jlab.org