Hello Kris and other NIM paper committe members.
Below please find my comments on the NIM paper in sequential order.
There are no page numbers on my manuscript. I define page 1 as the cover
page .
General: Can we have COLOR PHOTOGRAPHS?? And color plots?
Abstract: 'as a whole' -> entire?
Physics goals p2: The momentum span from 90 deg.... This is heavy and
unclear. Suggest: As measurements are carried out at more forward angles the
laboratory momenta of partcicles increase from a few hundred MeV/c around 90
deg to 25-30GeV/c around 2.- degrees. This has led to ....
A table up front with rapidity coverages of the various detectors would be
useful.
There is some confusion and inconsistentsy between the usage of the 'high
momentum anf intermediate mom. configurations' in various places. I would
suggest to define early on FFS and BFS and use that in the rest.
There are many inconsistent spellings. E.g. Mid Rapidty spectrometer, mid
rapidity, midrapidity etc...
Exp. layout: 1rst para. left and right of beam pipe should be defined. ADD:
near 90 degrees, from the perspective of beam particles travelling around
the RHIC ring in the anticlockwise direction.
Figure2. label for left ZDC is missing on figure. TOIFW label should be
moved closer to detector, separate T2 and H1 labels to show sequence. add
arrows. T3 label should be moved. ZDC orientation looks strange.
Perpsective?
p4. Para:' In the intermediate ...' REPLACE move by rotate (TWICE)
p5: I suggest to enlarge the photograph of the FS to cover two columns. It
needs a magnifying glass.
I also suggest a photograph of the MRS.
Global detectors:
para 1. REMOVE certain
para 2 : close quote around multiplicity
Magnets.p6.
momentum dispersion ... IN THE HORIZONTAL PLANE
p7 top. Window frame design. What is this? C-type?
para 3: the first (criterion-DELETE) was that the magnet MUST fit...
The second ( ) was to keep the fringe field...
para 4: need some introduction to why D1 is discusse din such great length.
Perhaps also mention data for D2 at RHIC location.
Also interesting are the fringe field plots of D2 at the location of T1 and
T2. these were made a copuple of years ago.
Spectrometers Detectors.
Para 1 line 9. in (the) each TPC.
para 1: I suggest to metion the actual partcile multiplicities/densities at
a few settings. JHL and IGB must be able to supply this out of memory to be
put in a small table.
last para: no, the TPC electronics is determined by COST and not by fancy
thinking. Everyone would like to have more channels! At least the FS
analysts. =>Idea for RHIC upgrade?
p9 para1: is this right is x always in the dispersive direction. Is this
also the way Geant , Brag etc handles this? Future BRAHMS students will
sweat over this if it is not right. EDITOR: HELP US.
para 3 middle : ..that (degrades) => linearly reduces ?
What about a figure showing the correlation between drift velocity and drift
voltage for different gas mictures? This will be useful for BRAHMS people in
the future.
Fig 8. Are these the corrected resistors?
Table 3: align numbers
p11 end of para1: Oscillations are (avoided) => minimized....
p11 Drift chambers para 1: resolution of (less) => better than
Would be good in this section to have some actual number for the
efficiency and the average number of partciles. A quick table?
What about a figure showing the layout of wires and the construction
principle? X and X' etc not clear to the reader.
right column para 3. Gas mixture (employed was)=> used IS...
USE PRESENT TENSE EVERYWHERE. They are still operational...
p12 TOF systems.
End para 2. H1 nad H2... optical grease AND SPING LOADING
p13 para 1: peaks have SIGMA = 99 ps.
ADD a photograph of H1
Mention somewhere that best tubes have SIGMS= 50-55ps.
p14.
Show a plot of C1 vs m2
Figure 14 is too small.
p15 Cherenkovs column 2, para 1. Rotated 8 (OR IS IT 9 )degrees????
last para in this section. REMOVE. USE DATA FROM 200 GEV instead. GET FROM
CLAUS:
p17: list the year 2001 configuration. This will be more useful as a future
reference.
p17 para 2. 1rst oreder trigger circuit => LEVEL 0 trigger circuit as used
later.
p17 A few words on the electronics scheme of the SiMA and the TMA would be
nice. A diagram? List modules. ALICE is interested in this.
p18 and 19 BB counters. The positions and radii of tubes should be listed.
p20. ZDC
Photograph?
p20. para2 right. ...fibers to sample only high energy particles that
produce C light...? Have I missed something? I guess whatever light comes
out is measured or..? Orientation...?
para 3: The timingg resolution of both (of the ) ZDCs leads to a ZDC vertex
determination resolution of approx. 3.6 cm.
para 3. end fullstop missing.
p21: trigger implementation.
para 1 line 3. compromise => COMPRISES (I HOPE....)
line 5: are 0> is
The whole para reads very badly!! Rewrite in clear text.
para 2 line 3. starts => start
line 5. LVL1 also resets the ADC's etc ???
p22 line 3 taken => selected among ...
para 1 line 4. For the 11b cross section for 1n+1n coinc. we must give a
reference. This is model dependent.
The second trigger selects about 60% .. as based on simulations of the
detection effeiciency using the HIJING code .(?).. bla bla.
This is also model dependent.
Later stage ..... etc..: This is NOW. DESCRIBE CURRENT TRIGGER
p22 TPC readout
START => STAR
p23. VME receiver module:
Each receiver board can receive data from XXX FEE cards.
ADD PHOTOGRAPH of a TPC TOP with FEE and RECEIVER CARD.
p28
show figure 27 on linear scale
p29
Get a better figure 30 from Claus Ekman.
ADD a figure showing C1 ampl. vs M2 in H1
Thats it folks
cheers
JJ
________________________________
Jens Jørgen Gaardhøje
Assoc. prof. Dr. Scient.
Chair Ph.D: school of Physics NBI.f.AFG.
(secretariat. 35 32 04 41)
Chair science committee. UNESCO Natl. Commission.
(secretariat. 33 92 52 16)
Office: Niels Bohr Institute, Blegdamsvej 17,
2100, Copenhagen, Denmark.
Tlf: (+45) 35 32 53 09
Fax: (+45) 35 32 50 16
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