Design and construction of the 14N parity experiment beamline

As shown in the preceding sections of this report, the measurement of a small (2 x 10-5) parity non-conserving effect in 14N via the resonant elastic scattering of protons on 13C requires novel designs in the apparatus. The proton counters must cover a large solid angle, yet produce pulses fast enough for the high counting rates. The beam transport system must provide fast automatic stabilization of beam position and angle. The beam line for this experiment must accommodate all of these design considerations while at the same time providing mechanical stability, to reduce asymmetries in the particle counting rates due to translation or vibration of the target chamber, and a clean high vacuum, to reduce carbon buildup on the target