Notes of Ndelta at 12 GeV
-------------------------

Measure M1, E1/M1 and S1/M1 at W=1232 for p(e,ep)pi^o exclusive
to as high as Q2 as possible. Measure center-of-mass cross section
as a function of W, theta_cm and phi_cm. At given Q2 fix electron
spectrometer and move the proton spectrometer around q-vector
to cover the full theta_cm and phi_cm range.

Important considerations:

1) Missing mass and center-of-mass angle resolution.
2) High momentum for electron ( 8.5 GeV/c) and proton
   ( 10.49 GeV/c) .
3) Well known central angle between two arms.



Kinematics
----------
Beam energy is 11 GeV

Max th_pq is maximum lab angle between proton and q vector
usually at around 90-110deg  theta_cm for W=1232.

p_p is proton momentum at the given theta_cm
 
Q2        E'     th_e     th_q      p_p    p_p
                                    thcm=0 thcm=180  Max th_pq
--       -----   ----     ----      -----  --------  ---------
4.000    8.525   11.855   33.389    3.132   1.849     5.3 deg
6.000    7.459   15.542   27.656    4.211   2.528     3.9
8.000    6.393   19.417   23.152    5.273   3.189     3.1
10.00    5.327   23.840   19.363    6.325   3.841     2.6
12.00    4.262   29.307   15.982    7.372   4.487     2.2
14.00    3.196   36.786   12.775    8.416   5.131     2.0
16.00    2.130   48.809    9.482    9.458   5.772     1.7
18.00    1.064   76.628    5.500   10.498   6.412     1.6

Beam energy is 8.8 GeV

Q2        E'     th_e     th_q      p_p    p_p
                                    thcm=0 thcm=180  Max th_pq
--       -----   ----     ----      -----  --------  ---------
4.000    6.325   15.406   31.871    3.132   1.849     5.3
6.000    5.259   20.743   25.633    4.211   2.528     3.9


Spectrometers
--------------
Max momentum in HMS is 7.4 angle range 10.8 to 80.

Max momentum of SHMS in the large solid angle mode (4.5msr) is 8.8 GeV
with angular range 10 to 25 degrees.

Max momentum of SHMS in the small solid angle mode (2.2msr) is 11 GeV
with angular range 5.5 to 10. degrees.


Comment
-------

It would be nice to get the resolutions in missing mass and for the
center of mass angle. I can do this for the SHMS/HMS combo and
SHMS/HRS combo with SIMC. 

Maybe Doug or Ron can get the angular and momentum
resolution of MAD.