Kinematics and Rate

Estimation of single arm rate, $\pi^-/e^-$ and $e^+/e^-$ are shown in Table 1. It is the same as the original runplan. Kinematic variables $\alpha$ and $\beta$ are also listed.

Table 1: $e^-$ rate for E99-117

kine #	$x$	rate	$\pi^-/e^-$	$e^+/e^-$	$\alpha$	$\beta$
		(Hz)
1	0.610	0.1410	$\sim$10	$\sim$ 0.2%	2.5554	0.5628
2	0.475	0.9522	$\sim$20	$\sim$ 0.5%	3.4869	0.8017
3	0.331	1.2805	$\sim$100	$\sim$ 3%	3.9670	0.6503

During first week of data taking at $x=0.6$, real rate is 520 good electrons per hour per spectrometer, e.g., 0.14 Hz per arm, with beam efficiency 75%.

Since real rate agrees well with the runplan, original estimation of event rate will be used in the following sections.