Changes to paper, with input from Peter, Jan and Fred Kees - - PowerPoint PPT Presentation

Changes to paper, with input from Peter, Jan and Fred Kees Ligtenberg, lepcol meeting 25-3-18

Section 1-2: References (1)

[3] is now “GridPix detectors – introduction and applications” [4] is CAST Leave [5] TIPP17 talk? (now with link) [6] is timepix3 reference “Timepix3: a 65k channel hybrid pixel readout chip with simultaneous toa/tot and sparse readout”

Section 2 small changes

• Inserted: diameter
• Clock frequency 640 MHz
• Changed to: “The box has length of 69

mm, a width (not shown) of 42 mm and a height of 28 mm with a maximum drift length of about 20 mm.“

• Moved: for the readout SPIDR software
• Removed: “The detector is cooled with

water”

• Grid voltage → local drift voltage
• Bigger text in figure
• Beam line → beam

Section 2: References (2) and other changes

• [8] for FEI4 chip (inactive added)
• [9] for TLU
• 280 is value at which drift speed is max
• Changed wording of threshold per pixel
• Moved drift speed value in text and

changed explanation on used value

• Pressure changed and checked (the
• verpressure was already included)

Drift speed

• Using telescope fit & timepix hits, mean z residual can be calculated
• Order 1% deviation from Magboltz drift speed, but data is very noisy

Mean z-residual [mm]

Air pressure

Morning of Juli 13th, with 19 mbar over pressure

Changed parameters and errors

Section 4.1

• Added “the positions …”
• Added reference to figure 3
• Changed legend entry and fit in

figure 3 to “Track fit”

Section 4.2

• Changed wording
• Cutflow made (for small part of run), but not put in
• Because some cuts are on hits not on events
• Because not very informative
• Mistake in percentage

Cut Rejected Timepix triggers 46105 100% less than 4 planes hit in telescope 2488 43617 95% All telescope clusters failed fit 2236 41381 90% More than one cluster in tpc 3204 38177 83% Telescope and tpc fits do not match 3378 34799 75% Less than 30 hits in tpc 1427 33372 72% tpc fit leaves or enters on the side 774 32598 71% Tpc entry already has a matching cluster 710 31888 69% At least 75% of hits in track 250 31638 69% Successful 31638 69%

Section 4.2

• Added “position of”
• “a magnitude corresponding with a time”
• “pass the whole tpc”
• “less than 1 mm away”
• “the projection of”
• “passed”-> “passes”

Section 5.1

• Changed wording for plateau sligthly.
• Should it be changed more?

Section 5.2

• “depends on the magnitude”
• Other small tekst corrections

Section 5.3

• Completely changed explenation on chi2

Section 5.4

• Hit resolution at zero drift is large?

Section 5.6

• “truncated sum of electrons”
• Changed sentence and added “optimally” to

indicate that the rejected fraction was

• ptimized.