NKS New Spectrometer NKS 2 Eg 1 1

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NKS New Spectrometer NKS 2 Eg =1. 1 -1. 2 Ge. V Black contour:

NKS New Spectrometer NKS 2 Eg =1. 1 -1. 2 Ge. V Black contour: Acceptance cosθlab Eg =1. 0 -1. 1 Ge. V Red contour: D 2 target K 0 production Eg = 0. 9 -1. 0 Ge. V cross-section from Kaon-MAID model Eg = 0. 8 -0. 9 Ge. V 2006/8/18 K 0 momentum [Ge. V/c] 3

cm Offline解析 – vertex分布 beam cm 2006/8/18 8

cm Offline解析 – vertex分布 beam cm 2006/8/18 8

2006/8/18 11

2006/8/18 11

• DAQ performance 2006/8/18 12

• DAQ performance 2006/8/18 12

setup a few CAMAC TDCs k 0 daq 2 k 0 daq 1 2006/8/18

setup a few CAMAC TDCs k 0 daq 2 k 0 daq 1 2006/8/18 13

収量は？ – Beam intensity : 2~3 MHz – C 1. 2 cm – Duty

収量は？ – Beam intensity : 2~3 MHz – C 1. 2 cm – Duty factor : ~60% – 80% (C) – Period : 250 hours (C) – Acceptance : 2倍 1~1. 5 MHz C 1. 2 cm ? 80 ~ 90 % 70 hours K 0は 200個程度見えるか？ 数はともかく、NKS 2でK 0のピークを見てみたい。 2006/8/18 15

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