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NKS2 Meeting 2008/10/16

NKS2 Meeting 2008/10/16. K. Futatsukawa. NKS2. Simulation Result. Tracking and Vertex Search. Diff: vx (tracking &vertex search) - dx. Vertex Search (first point from simulation). Diff: vx (vertex search) - dx. vx : vertex point x dir. from analyzer dx : decay point x dir. from simulation.

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NKS2 Meeting 2008/10/16

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  1. NKS2 Meeting2008/10/16 K. Futatsukawa

  2. NKS2

  3. Simulation Result Tracking and Vertex Search Diff: vx (tracking &vertex search) - dx Vertex Search (first point from simulation) Diff: vx (vertex search) - dx vx : vertex point x dir. from analyzer dx : decay point x dir. from simulation x [cm] Tracking is cause, but program resolution of vertex search is not so good

  4. Step Size of Runge-Kutta Vertex Search (first point from simulation) Strongly dependence on step size of Runge-Kutta Not Only RMS but also Mean, Tail

  5. Simulation Condition Tracking and Vertex Search Diff: vx (tracking &vertex search) - dx Vertex Search (first point from simulation) Diff: vx (vertex search) - dx Simulation Condition : 0.8 < PK0 < 1.1 [GeV/c] 0.5 < cosqK0 < 1.0 Not So Good x [cm]

  6. Simulation Condition Tracking and Vertex Search Diff: vx (tracking &vertex search) - dx Vertex Search (first point from simulation) Diff: vx (vertex search) - dx Simulation Condition : 0.8 < Eg < 1.1 [GeV] Isotropic in CM frame Vacuum of all materials x [cm] Runge-Kutta Step Size 1.0 Two peak is distinguished

  7. Step Size of Runge-Kutta Vertex Search (first point from simulation) Step Size 1.0 Simulation Condition : 0.8 < Eg < 1.1 [GeV] Isotropic in CM frame Vacuum of all materials Step Size 0.5 Strongly dependence on step size of Runge-Kutta Step Size 0.25 I think Runge-Kutta : not so bad Interpolate : bad Step Size 0.1

  8. New Vertex Method p+ Vertex Search : Runge-Kutta Method Pre-Pre Points Pre-Points p- Nearest Points 1st Runge-Kutta(ss1.0) : Search the nearest points 2nd Runge-Kutta : one more time from pre-pre points using smaller ss

  9. New Vertex Method Vertex Search (first point from simulation) Simulation Condition : 0.8 < Eg < 1.1 [GeV] Isotropic in CM frame Vacuum of all materials Enough Performance 1st Runge-Kutta(ss1.0) : Search the nearest points 2nd Runge-Kutta : one more time from pre-pre points using smaller ss pre ss0.05

  10. NKS2-2 = NKS3

  11. CAMAC Scaler Left > Right Why ??? From Upstream, Beam line 1 m Wanted : No Target, No Radiator Data #run 2063

  12. Width : VC Width of Discriminated Signals abs |falling – rising| Expected Shape signals noises Not like this !!! We can’t separate signals from noises Or Noises level was too less [ch]

  13. Width%TDC : VC X axis : TDC [ch] Y axis : Width [ch] ? …?? …….??? No Comment !!! Projection to X dir. in Next Page

  14. ProjectionX : VC W:20~40 W:40~60 W:60~80 W:0~20 X axis : TDC [ch] W:100~120 W:120~140 W:140~160 W:80~100 ? …?? …….??? In small width region, noise level is larger. A little …my feeling !!! W:180~200 W:200~220 W:220~240 W:160~180 W:260~280 W:280~300 W:240~260 Whether we have widths or not, We can’t separate signals from noises. (in this level)

  15. Width%TDC Vol.2 : VC Same graphs From Scatter To Contour No signals in this region far from s-wires Hypothesis : In the region far from s-wires, the effect of diffusion is large. Large pulses -> Small pulses Small pulses -> Too small pluses, under the Vth

  16. Rising ?, Falling ?, Leading ?, Trailing ? Rising : fr = 1 Really ??? One manual : fr=1 : leading edge fr=0 : trailing edge Other manual : fr=1 : falling edge fr=0 : rising edge TDC distribution and old data talk : fr=1 : falling edge fr=0 : rising edge Falling Falling : fr = 0 Rising I am sorry for having mistake of name in UserDCMonitor.cpp Bad Boys are this manual and Tsukada-san

  17. HV dependence : TDC HV : 2100 V, Vth : - 3 V HV : 2000 V, Vth : - 2.5 V HV : 1900 V, Vth : - 3 V rising rising rising #run 2043 #run 2044 #run 2063 falling falling falling Not So Bad Not enough HV ??? More Need ???

  18. Width%TDC Vol.3 : VC HV : 2100 V, Vth : - 3 V Red Region : HV ~2000V, Vth -2.5 V NOT Modify @HV～2000V, Vth -2.5V

  19. Width%TDC Vol.3 : VC HV : 2100 V, Vth : - 3 V … Attention Please !?

  20. Cross-Talk The channels of no connect to VC don’t have signals The cross-talk is too less @ASD & AMT-TDC

  21. Channels Correlation ch43%ch41 ch42%ch41 AMT20 ch 43 [ch] AMT20 ch 42 [ch] AMT20 ch 41 [ch] AMT20 ch 41 [ch] Next Channel Next Next Channel What is this correlation ???

  22. Channels Correlation ch42%ch41 ch42%ch41 Next Channel AMT20 ch 42 [ch] AMT20 ch 42 [ch] AMT20 ch 41 [ch] AMT20 ch 41 [ch] Width Cut : Width < 50 ch Selected Region

  23. Number of Hits B : rising #hits R : #hits @ width < 50 ch …………NoComment!!!

  24. Number of Hits @TDC<750 B : rising #hits R : #hits @ width < 50 ch DifferentShapes!!!

  25. Number of Hits Rising R : #hits @ 1100 < tdc < 800 B : #hits @ 300 < tdc < 600 We can’t get the information form #hits

  26. Event Display Just a Moment, Please !!!

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