Hi Max, 

very well written paper! I think that it is so far the most complete paper on large micromegas for hadron calorimetry. 

Firstly, as I was deeply involved in development and tests of the 1st m2 chamber, please keep me in the paper author list. It is honour for me to be a part of it!  

Here are several minor commends:

Page 1: 

In author list: J. Jacquemier should be written together on a single line

In abstract you say that there are some advantages in comparison to more conventional detectors. I think that you should add some examples such as: free of space charged effects, .... Are there any drawbacks?

Missing Keywords: MPGD, Micromegas, Hadron calorimetry, linear colder, ...

lines:
87: (or ASU) -> (ASU)

111: it reduce heat but also power consumption

129: why there is space between line 129 and 130? Same for lines 150/151, 327/328, 550/551

186: was found -> was reached (this sound better for me as it indicates kind of achievement)

273: p1/p3 -> p1/p4

274: p2/p3 -> p2/p5

312: ([17]) -> [17]

324: set at -> set to

335: are of a few -> are a few/ are several

356: beam line H4 -> H4 beam line

table 3: error is expressed in % or in absolute value?

546: I should put all thresholds in MIP unites: 0.1(?)MIP, 2 MIP, 5 MIP and in brackets in fC. It is not good to mix two different units for the same thing

553: 10 cm radius seems to me a bit large. Moliare radius for iron is 1.7 cm, and 99% of shower is contained within 3.5 Rm. So I should expect a radius of about 1.7*3.5 = 6 cm. Also in case of sampling calorimeter the shower radius can be larger due to active layers (low density) contribution. It should be good to explain why you found the shower radius larger.
 
557: I think that is more easy to identify the electromagnetic part using the pater recognition algorithm (part of PFA package)

637: good -> excellent

Generally I should change notation for voltage from V to U, which is more common. Also I should rename the parameters, so it is clear what they express, for instance on line 496: p0 -> eff, p1, p2 -> U1, U2, ....
  
There is still a bit of space at the end. What about to add Acknowledgement?

That's it.
 
Cheers, 

Jan 
 


________________________________________
From: Maximilien Chefdeville [chefdevi@lapp.in2p3.fr]
Sent: 11 April 2013 20:50
To: LCDetecteurs@lapp.in2p3.fr
Cc: Espargiliere Ambroise; Jan Blaha; Yorgos Tsipolitis; Stergios; dam.girard@wanadoo.fr
Subject: Draft 2.1 of the Micromegas publication

Dear all,

after implementation of several useful corrections, I would like to
thank the reviewers and propose a new draft of the publication

"Construction and test of a 1x1 m^2 Micromegas chamber for sampling
hadron calorimetry at future lepton colliders"

Is it based on the NIM template and is available at:

https://indico.in2p3.fr/conferenceDisplay.py?confId=8194

For those who don't have access to the in2p3 indico, you can download
the .pdf draft from:

http://lappweb.in2p3.fr/~chefdevi/Work_LAPP/NIMA/

Please take the time to read it through once more and let me know if you
have no objection with the content and would like to have your name kept
in the author list.

Other corrections are still possible during next week as I am planning
to submit it to NIMA on Friday the 18th of April.

Kind regards

Max