S-2S Wiki

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====後神====
{{:gogami_s-2smeeting_2014_8_27_.pdf|pdf file}}
   * Missing mass resolution simulation with CH<sub>2</sub> target 
     * Effect of Ξ<sup>-</sup> and decayed particles from Ξ<sup>-</sup> on the energy loss correction of missing mass. --> Correction seems to be impossible. 
   * will start designing WC detectors, and frame of WC and TOF detectors. 


====金築====
{{:stsmeeting140827.pptx|pptxファイル}}
  * S-2S official web page was updated. 
  * S-2S Wiki: 
       * Edit can be done by only core members (Nagae, Gogami, Kanatsuki, Takenaka) so far. 
  * Acceptance map for generation points (x,y and z) around target region were shown as histograms. 
  * Momentum resolution with drift chambers (simulation) 
      * No wires: FWHM = 5.5 × 10<sup>-4</sup> 
      * W plate (0.1 μm) : FWHM = 5.7 × 10<sup>-4</sup> (thought to be realistic case) 
      * W plate (1 μm): FWHM = 6.3 × 10<sup>-4</sup> (comparable level to the case with fiber detector)  
      * W plate (10 μm): FWHM = 12 × 10<sup>-4</sup> 
  * About SDC2: 
     *If SDC2 is used with rotation of 90 degrees, x-position resolution is deteriorated (σ<sub>x</sub> = 0.2 mm → 1.1 mm). --> Δp/p = 7.7 × 10<sup>-4</sup> (This result is worse than that of our intuition. Need to be checked.) 
  * Required sizes for drift chambers: 
     * SDC1: 75 × 125 mm<sup>2</sup> 
     * SDC2: 95 × 240 mm<sup>2</sup> 
     * SDC3: 800 × 400 mm<sup>2</sup> 
     * SDC4: 920 × 550 mm<sup>2</sup> 
  * Detector lists 
  * Schedule for preparation 
====竹中====
  * Analyses of data of prototype WC detector, which were taken at ELPH 
     * x,y-position dependence were shown.
     * Position dependences were smaller than those of Geant4 simulatin. --> will use the Geant4 simulation by himself with Kanatsuki-kun's support. 
  * Preparation for presentations in Atagawa and Hawai meeting. 
     * Rough overview will be prepared by next week. 

====その他====
  * Indian summer school in Prague, Czech Republic (9/3 - 9/7) 
  * Next S-2S regular meeting: TBD ( 9/16(火) 10:30- ? ) 
  * Workshops at Atagawa (9/23-25) (9/25-27)

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