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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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Nks2 meeting 2008 10 16

NKS2 Meeting2008/10/16

K. Futatsukawa


Nks2 meeting 2008 10 16

NKS2


Simulation result

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


Step size of runge kutta

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


Simulation condition

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]


Simulation condition1

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


Step size of runge kutta1

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


New vertex method

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


New vertex method1

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


Nks2 meeting 2008 10 16

NKS2-2 = NKS3


Camac scaler

CAMAC Scaler

Left > Right

Why ???

From Upstream, Beam line

1 m

Wanted : No Target, No Radiator Data

#run 2063


Width vc

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]


Width tdc vc

Width%TDC : VC

X axis : TDC [ch]

Y axis : Width [ch]

?

…??

…….???

No Comment !!!

Projection to X dir.

in Next Page


Projectionx vc

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)


Width tdc vol 2 vc

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


Rising falling leading trailing

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


Hv dependence tdc

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 ???


Width tdc vol 3 vc

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


Width tdc vol 3 vc1

Width%TDC Vol.3 : VC

HV : 2100 V, Vth : - 3 V

… Attention Please !?


Cross talk

Cross-Talk

The channels of no connect to VC don’t have signals

The cross-talk is too less @ASD & AMT-TDC


Channels correlation

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 ???


Channels correlation1

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


Number of hits

Number of Hits

B : rising #hits

R : #hits @ width < 50 ch

…………NoComment!!!


Number of hits @tdc 750

Number of Hits @TDC<750

B : rising #hits

R : #hits @ width < 50 ch

DifferentShapes!!!


Number of hits1

Number of Hits

Rising

R : #hits @ 1100 < tdc < 800

B : #hits @ 300 < tdc < 600

We can’t get the information

form #hits


Event display

Event Display

Just a Moment, Please !!!


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