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 • overpressure 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 optimized.
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