Calibration tube and one--dirnensional renlOt0 control [4] a. Responsihility i. FGD ii. PHSC 3. Nitrogen hox a ·" -4­.. 4. Driit chamber: L 120 x 120 cm2 drift chamber a. ResponsibIlity i. PI-ISC -F ermilab 5. Mechatlical mount 1. Two-dimensional remote control mechanical mOlmt for items I, 2» 3, 4, 5, a. Responsibility i. PHSC -F ermilab 6. Calibration device [6 each

Tubes - nuclear services - ADC - Self Trigger - LED a. Responsibility i. FGD This document just records, as mentioned above, informal discUssions between Drs. Velltura and This document is not meaut to be a binding commitment but,rather, a for discussion before any final commitments are made. In particular~ the attached rough sketch is.only that N. The LED much eHort mlJst be expended before these crude become a working scheme. 30 January. 19'15 F~ Q J:>_~. N L,r'-)', 1 _:!::-.-,_ ::..-!~...~___~ A is a reference PM, whose gain is kept constant by mOnitoring the light pulses ['cnIl the NetI (Am 241 doped) source L can be moved, by compnter control, over the central region of the es of lC

d glass blocks 1, 2, 3, etc. to control the stahility of their gdins, and 0'.'2r A to check for shifts in the light output of L itself. Since for the lead glass c:eLL-..~ers a pulse intensity is Ileeded equjvo.lcnt to the light from a shower of s cveral tens GcV, while the pulses from Ncorrcspond to or rv 1 GeV 8ho'N( ::, an attenuating filter F is set between L and the pbotocathode of A, so as to r0'_'i11y equalize its outputs