Maximum Beam Power and Nominal Beam Losses at S-20

The maximum credible beam power values for electrons shown in Table 1 for e- beams are based on a beam power of 1.8 MW (1.875 x 1012 e- at 120 Hz) for an energy of 50 GeV at S-30. Positrons are limited by the positron source damage threshold to an average current of ∼2 μA, i.e., ∼1011 e- per pulse at 120 Hz on the target [1]. The ratio of e+ at S-1 per e- on the conversion target is (ge)2. At S-20 the maximum linac energy is 33 GeV, while the HER and LER Bypass beams are limited to 12 and 4 GeV respectively by the BCS