The Second Look (Nov 8th)

Standard candle event selection mostly based on center of brightness because

it is NPE/Nch independent

thus, initial intensity independent

such that we can keep the value under study untouched

event-wise quantities due to some bad string/doms by looking at dom-by-dom basis

revisit double peaks in the NPE distribution but not in Nch

From Feb/06: at 4 Different Intensities

100% black

75% red

50% blue
25% green

upper left: initial center of brightness z position without cut

upper right: after cut on cob z

lower left: after cut on cob x and z

lower right: Nch after sc selection cut

Feb and July

100% Feb(black)

50% Feb(blue)
100% July(red)

50% July(green)

The same plots with the same cut applied for July data

From Feb: 4 – string 40 only at different intensities

100% black

75% red

50% blue
25% green

Atwd near SC difficult to see clear intensity dependencies

the same for FADC except the closest

From Feb and July:
2 Different Intensities – string 40

100% Feb(black)

50% Feb(blue)
100% July(red)

50% July(green)

From Feb: 4 Different Intensity Comparison – string 39

100% black

75% red

50% blue
25% green

From Feb and July:
2 Different Intensities – string 39

100% Feb(black)

50% Feb(blue)
100% July(red)

50% July(green)

All Strings Feb and July

100% Feb(black)

50% Feb(blue)
100% July(red)

50% July(green)

Feb -> July

there are quite string dependencies

e.g. string-30 shows good agreement between Feb data and July data but s-40 the SC string (especially nearby SC) result quite a large differences

The same plot July only

s49 seems to be too high

s50 is the next highest (except 40)

event the "next" strings

gives quite different values

100% July(black)

50% July(blue)

About double peaked structure on the event sum NPE

100% Feb(black),

50% Feb(blue),
100% July(red),

50% July(green)

atwd based npe

Nch

July 100% event
event-total and string-wise NPE Sum

double peeks are from string 40

other strings are free of it

49, 40, all strings

50, 39, 30, 50

21,38,29

S-40 doms near SC are problematic

To be safe, events with S40 # 20~23 npe less than 1800 will be removed (->~half of SC events)

22

20,21

18 19

23

24

sum of #21+#22

atwd waveforms S40-Dom22 (the closest) from July (about half are bad)

how about S49

There is some peaks but not due to bad waveforms

75 and 50 % matching puzzle

atwd based npe

Nch

S49 weren't on for 76% run

FADC?

2006-11-08T06:56:59