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High Energy Spectrometer and Kicker Status Report

This report highlights the tuning of the matrix for the High Energy Spectrometer (HES) and Kicker (Kmom), detailing the distortion of Emom and Kmom at various degrees. It also addresses issues with the tuning process reported earlier, links to relevant resources, and discusses studies on signal-to-noise, resolution, and expected improvements. The report concludes with a roadmap for future resolutions.

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High Energy Spectrometer and Kicker Status Report

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  1. Contents HES Status ReportDec ’07 Part1

  2. Matrix tuning 4-1(Reminder) Emom, Kmomの両方を歪めてみる。 Emom, Kmomすべての次数を一度にtuning Emom 1次,Kmom 1次 →Emom ２次以上　→ Kmom 2次以上 → … Emom 1次,Kmom 1次 →Emom ２次,Kmom 2次 → … limit … 0次：±1MeV, 1次：[-0.1, 0.1] initial … 0次：967MeV/1196MeV, 1次：dummy, その他：0 HES before HES GOD HKS before HKS GOD このようなtuningでL, Sが細くならないという報告をしたが、プログラムにバグがあった。

  3. Matrix tuning 4-4 10 times • Emom, Kmom tuning • Answer = GOD • Background free • limit … 0次：±1MeV, 1次：[-0.1, 0.1] • initial … 0次：967MeV/1196MeV, 1次：dummy, その他：0 5th 10th

  4. Singles rate comparisation source … http://hallcweb.jlab.org/hclog/0508_archive/050815191617.html http://hallcweb.jlab.org/hclog/0509_archive/050910115825.html http://hallcweb.jlab.org/hclog/0509_archive/050912022419.html http://hallcweb.jlab.org/hclog/0509_archive/050911163500.html http://hallcweb.jlab.org/hclog/0509_archive/050909203021.html 横田・川間計算 E01-011のrateが高いのはmollerの影響が大きいことに起因していると思われる。 ちなみにHallCElogはuser : HMS, pass : SOSで見れる。

  5. S/N Study @ E01-011 動機・・・E01-011のS/Nを理解しているのか？ 条件　e’ Rate : 1MHz, K+ Rate : 200Hz, Coin window : 2ns, 100nb/srRate : 5/hr →BG 50000 eventに対して 100nb/srピークは173 event 35hr

  6. S/N study @ E05-115 e’ Rate : 1MHz K+ Rate : 100Hz Coin window : 2ns 100nb/srピーク : 50/hr e’ Rate : 1MHz K+ Rate : 100Hz Coin window : 2ns 100nb/srピーク : 25/hr 35hr 44hr

  7. HES Resolution Study w/ Target HES Side (12C, 100mg/cm2 , random Zt , virtual photon distribution) dp/p=3.5e-4 (FWHM) dq=2.1mrad (FWHM) この値で計算するとMM分解能は500keVになってしまうとです・・・ ただし、targetを置かない場合でもdpはほとんど変化なし（Energy lossのみ）。 dqは半分くらいになる。

  8. HKS Resolution Study w/ Target, Material dq=1.0mrad (FWHM) dp/p=2.6e-4 (FWHM) • Elossによるoffsetはdp=72keV。一方Bethe-BlochによるEloss計算でいうと97keV程度。 • 実はHKSもChamberを入れると意外に運動量分解能が悪い。 • 物質なしではdp/pの値はほとんど同じだった。dqは0.7mradくらいで少し良い。

  9. Expected resolution

  10. Next to do

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