This is an example of use of the multi-purpose wobbling for a secondary pion
beam at -300 GeV in H4.
Any secondary beam in the range 100-375 GeV (negative) can be picked up at
different production angles.
If posive beams wanted in H4 the sign of B3 has to be changed and H2 will get
negative beams.
The production angle is calculated as:
Prod.Angle = 5.6 *(150/p-1) *22./27.25 The "skew" in B1 = Prod.Angle*5.25/22