/[PAMELA software]/gpamela/history/v_100.txt

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-revision 3.1 by cafagna,
Thu Jul 11 16:01:59 2002 UTC
+revision 3.20 by pam-ba,
Thu Nov 16 18:45:29 2006 UTC
 Line 1
  #
- # $Id$
+ # $Id: v_100.txt,v 3.19 2006/11/16 12:01:13 pam-ba Exp $
+ #
+ # $Log: v_100.txt,v $
+ # Revision 3.19  2006/11/16 12:01:13  pam-ba
+ # S4 dimensions corrected.
+ #
+ # Revision 3.18  2006/11/10 11:39:35  pam-ba
+ # S2 and S1 z-positions corrected, He3 and plystyrene mixture added, Top Plate geometry simulated and titanium mixture added.
+ #
+ # Revision 3.17  2006/10/13 16:36:59  pam-ba
+ # Added a new material, the cadmium, for ND
+ #
+ # Revision 3.16  2006/10/12 11:11:21  pam-ba
+ # ND geometry updated.
+ #
+ # Revision 3.15  2006/10/02 11:17:30  pam-ba
+ # NDET 'SPHE' data card meaning changed. Now it eliminates the whole PAMELA container.
+ #
+ # Revision 3.14  2006/06/30 15:38:16  pam-ba
+ # S22 and S12 heights positioned in GPAMELA at the nominal heights in PAMELA (see document: Main geometrical parameters of the PAMELA sub-detectors, 20 December 2005)
+ #
+ # Revision 3.13  2006/06/05 13:56:17  pamela
+ # Gigantic resonance added for gamma enetering in the calorimeter absorber
+ #
+ # Revision 3.12  2006/05/18 10:52:32  pam-ba
+ # TOF geometry completed and a new material, the polystyrene (density 35 g/l), added
+ #
+ # Revision 3.11  2006/05/11 23:53:15  cafagna
+ # More bugs fixed in the CALO ntple structure filling
+ #
+ # Revision 3.10  2006/04/10 11:07:43  cafagna
+ # GEN data card updated, ZDGEN added
+ #
+ # Revision 3.9  2005/12/14 03:34:40  cafagna
+ # An update of the history and inform readme files.
+ #
+ # Revision 3.8  2005/12/14 03:16:08  cafagna
+ # Neutron detector added. Geometry and GPCALOR package
+ #
+ # Revision 3.7  2005/10/18 08:24:35  cafagna
+ # History updated
+ #
+ # Revision 3.6  2005/07/25 11:53:21  cafagna
+ # Several updates. See history for details
+ #
+ # Revision 3.5  2004/04/06 10:33:46  pamela
+ # NON-REPRODUCIBILITY problem of a GPAMELA RUN fixed; bug found and fixed filling in the hit structure of the calorimeter
+ #
+ # Revision 3.4  2003/12/17 11:32:50  pamela
+ # CALO SIMULATION COMPLETED: geometry and special tracking parameters updated and simulation checked by a comparison with the Trieste's standalone Monte Carlo simulation
+ #
+ # Revision 3.3  2002/12/05 17:27:59  pamela
+ # New GARFIELD.GAR file added and GPAMELA.FFR cleaned and updated
+ #
+ # Revision 3.2  2002/12/05 10:17:42  pamela
+ # Update CAS and CALO geometries and positions. Makefile updated as well
+ #
+ # Revision 3.1.1.1  2002/07/11 16:01:59  cafagna
+ # First GPAMELA release on CVS
  #
- # $Log$
  #
  #CMZ :  3.00/00 11/02/2002  20.05.23  by  Unknown
  #CMZ :  2.03/00 06/11/2000  02.14.56  by  Francesco Cafagna
-Line 14
+Line 71
  #CMZ :  1.00/03 30/04/96  12.23.59  by  Francesco Cafagna
  #CMZ :  1.00/02 05/04/96  15.31.25  by  Francesco Cafagna
  #CMZ :  1.00/01 28/11/95  18.51.23  by  Francesco Cafagna
  #-- Author :    Francesco Cafagna   28/11/95
+ November 2006, Bari
+ S4 GEOMETRY UPDATED:
+ The x and y dimensions have been corrected because they were wrong.
+ A container of aluminum has been added having walls of thickness equal
+ to 0.1 cm.
+ TOF POSITIONS DEFINITELY UPDATED:
+ S2 and S1 have been positioned again, after the simulation of the top plate.
+ Before now, the positions were put ad hoc based on the positions given by
+ Sergio Ricciarini in the document 'Main geometrical parameters of the PAMELA
+ sub-detectors' released by O. Adriani, L. Bonechi, E. Mocchiutti and
+ S. Ricciarini on the 20th of December 2005.. These positions were
+ lightly approximated.
+ ND GEOMETRY COMPLETED.
+ The He3 and the polyethylene (CH2) have been added to fill
+ the volumes NDTI and NDPB in the neutron detector. Leonov gave us the
+ details of these materials.
+ TOP PLATE GEOMETRY ADDED.
+ The top plate geometry has been simulated as a N2 box that has the same
+ dimensions of CATA. Inside it, at the right positions, there are S2 and CATA.
+ The real top plate is a rectangular window having a thickness of 0.5 cm
+ (volume TPTL emptied by the volume TPCV). This volume is filled with a mixture
+ of titanium (90%), aluminum (6%) and vanadium (4%). Other parts of titanium
+ are the four volumes TPTU, which are positioned at the corners of TPTL at the
+ same height of CATA, and the four volumes TPTM, which are positioned at the
+ corners of TPTL, at the same height of S2.
+ The geometry  of the top plate is based on a simplified version of the CAD
+ drawings.
+ October 2006, Bari
+ The geometry of the neutron detector has been updated. Some dimensions of some
+ volumes have been corrected and the aluminum cover and the aluminum boxes to
+ put the cables have been added. A new material, the cadmium, has been also
+ defined.
+ September 2006, Bari
+ SPHE and ND data card bugs fixed: the definition of the ND data card,
+ missing in the subroutine gpgeo.F, has been added; the meaning of the SPHE
+ data card has been changed. Before the correction the data card:
+ NDET 'SPHE' was used to delete the spherical top shell to substitute it with
+ a flat one.Now NDET 'SPHE' eliminates the whole container of PAMELA.
+ June 2006, Bari
+ The center of the scintillator planes S22Y (variable ZPAMS22Y in gpdgeo.inc)
+ and S12X (variable ZPAMS12X in gpdgeo.inc) has been positioned at the
+ nominal height as measured in PAMELA (See the document: "Main geometrical
+ parameters of the PAMELA sub-detectors" by O. Adriani, L. Bonechi,
+ E. Mocchiutti, S. Ricciarini, 20 December 2005). Follows that the positions
+ of S21Y and S12X are higher than those in the cited document due to the fact
+ that in GPAMELA the thickness of the mylar has been considered while in the
+ document it has been neglected.
+ May 2006, Bari & Tor Vergata
+ GIGANTIC RESONANCE FOR NEUTRON DETECTOR ADDED
+    Routines to simulate the gigantic resonance of gammas in Tungsten
+    have been added.  The GPGIG routine is called in GUSTEP if a gamma
+    enter the calorimeter absorber.  This is the steering routine to
+    simulate the production of neutrons from gigantic resonance.  It
+    does checks on STEP lenght. If the range is smaller than the other
+    selected for that step, it does generate the neutron and stops the
+    gamma. Please note that the neutron has now a new particle
+    number. This is to tag the gigantic resonance neutrons.
+ May 2006, Bari & Florence
+ CAL HIT STRUCTURE BUGS FIXED
+    The maximum number of hit is now different for the two hit
+    structures: CALST and CALI. Vectors inizialization and HBOOK
+    ntple booking have been updated. The GPDCAL routine has been fixed
+    so to handle the case in wich hits stored are more than the maximum
+    number of hit.
+    In this case in the ntple up to the maximum number of hits will be stored.
+ April 2006, Bari
+ TOF GEOMETRY AND POSITIONS UPDATED AND NEW MIXTURES ADDED
+    The TOF geometry has been modified. The following boxes have been
+    added: POL1, POL2 and POLY made of polystyrene, S11M, S12M, S21M,
+    S22M, S31M and S32M made of mylar, S1A, S2A and S3 made of air and
+    S1 and S2 made of aluminum. Each scintillator paddle has been put
+    in his mylar box and the other materials: air, polystyrene, and
+    aluminum have been added at their nominal positions.  According to
+    Naples people the araldite glue has been simulated has an air
+    gap. For this work two new materials: the Mylar (MYLAR) and the
+    polystyrene (POLYSTYRENE) with a density of 35 g/l have been
+    defined as a mixture.  The positions of the three bottom
+    scintillator planes that contain respectively the S12X, S22Y and
+    S32X paddles have been regulated according on their official
+    positions in PAMELA.
+ Mar 2006, Bari
+ GEN DATA CARD UPDATED
+    To enable generation on a surface perpendicular to the XY plane,
+    GEN gata card has been updated addingh a new parameter: ZDGEN. This is
+    the dimension, along Z axis , of the generation surface. The Z
+    position will be randomply chosen according to: Z= ZDGEN*RNDM_NUMBER +
+    ZGEN, i.e. Z= GEN(6)*RNDM_NOMBER + GEN(3).
+ Nov 2005, Bari
+ GUHADR AND GUPHAD UPDATED
+    To use GCALOR package the hadronic routines have been updated. The
+    inizialization routine call CALSIG, while the other calls GCALOR.
+ NEW GPKEY ADDED: GPCALOR
+    This logical has been added to enable the GCALOR package. This flag
+    is set to true in GPDAT if the data card: HPAK, is set to
+    'GCAL'. The gpkey.inc has been update accordingly.
+ NEUTRON DETECTOR ADDED. NEW DIR: GPND
+    The neutron detector has been added. At the moment it is just the
+    geometry. The directory structure of the repository has been
+    updated as well. Dimensions has been taken from picture and
+    literature. A full upgrade to the drawing is needed.
+ GCALOR PACKAGE ADDED. NEW DIRs: GPCALOR, GPCALORDES
+    GCALOR package contins the CALOR simulation code and an interface
+    to use it in GEANT. The important feature for us is the usage of
+    the MICAP code. This is facused on the low energy neutron
+    simulation. for details see:
+    http://www.staff.uni-mainz.de/zeitnitz/Gcalor/gcalor.html
+    This package should be distributed with the GEANT library but is
+    not up to date. I did download the latest release and stored into
+    gpcalor directory of the gpamela tree.
+    Then I did clean up the code substituting the explicit inclusion of
+    the commons with a #include cpp directive. In parallel I did
+    extract the commons to include files having the same common name. I
+    did store the include files into a newly created directory:
+    gpcalordes.
+    The Makefile has been updated accordingly.
+    Please note that to avoid conflict with CRENLIB distribution the gcalor source file has been named gpcalor.F
+    NOTE: There are still problem due to different common sizes. In
+    particular the common MICFIL is maller in the geant library
+    libgeant.a . There the subroutines: gmorin, gmxsec, gmplxs, are
+    present and linked using a wrong version of the common. This still needs to be debuged.
+    NOTE2: The auxiliary files with the cross sections: chetc.dat.gz
+    and xsneut.dat.gz, have been added to the aux directory and moved
+    to the working directory, i.e. GPAMELA_BIN. The GCALOR routine will
+    look for CERN_ROOT environment variable. If found files are
+    searched there at first, then in the working directory. A fool
+    proof policy has to be implemented to avoid problem with
+    synchronization fo these files.
+ The GCALOR package
+ June 2005, Bari
+ TOF SCINTILLATOR PADDLES UPDATED
+    The dimensions and the number of the scintillator paddles for each
+    TOF planes have been updated.
+ May 2005, Bari
+ Some updates on the latest modification done in the past year.
+ NEW DATA CARD ADDED: HFSF
+    To define a policy for the random number initial seeds
+    definition. Using this card is possible to override GEANT seeds
+    defined via NRDM card. The policy is selected according to the
+    values:
+    - 1: The seeds are initialized to the initial values found in a user
+         defined file or the default file: INPUTSEED.DAT
+    - 2: The seeds are initialized to the final values found in a user defined
+         file or the default file: INPUTSEED.DAT
+    The case 1 must be used in case the user needs to reproduce the
+    random chain of a previous run. In this case the user can save the
+    initial seeds, used in the run he would like to reproduce, in a
+    binary file and pass the filename to the program using the *FLSF
+    data card. In case the user file is not specified the default
+    INPUTSEED.DAT will be used.
+    The case 2 must be used in case the user needs to chain several
+    GPAMELA run and likes to be sure he is starting the random
+    generator using the right sequence. In this case the user must
+    specify an input binary file using the *FLSF data card, otherwise
+    the INPUTSEED.DAT file will be used.
+ NEW DATA CARD ADDED: *FSFI
+    Using this card the user can specify the logical unit and name of
+    the file storing the initial seeds to be used to initialize the
+    random number generator. This file must be a FORTRAN binary one
+    storing four integer numbers. The first two are the number to be
+    used in the case: HFSF=1, the other two will be used in the case:
+    HFSF=2. This file can be one created by GPAMELA or by the user
+    filled with his own seeds. For this purpose an utility program:
+    writeseeds.f, has been added in the aux directory.  In case the
+    *FSFI card is not specified the default values: 24 and INPUTSEEDS.DAT, will
+    be used as LUN and file name respectively.
+ NEW DATA CARD ADDED: *LSFI
+    Using this card the user can specify the logical unit and name of
+    the file storing the first and last seeds used in the GPAMELA
+    run. This file is a FORTRAN binary one. This file can be used as
+    input one specifying it in the *FSFI data card of the next GPAMELA
+    run.  In case the *LSFI card is not specified the default values: 26
+    and HBOOKFILENAME.DAT (as sepified in *HFI), will be used as LUN
+    and file name respectively.
+ NEW UTILITY PROGRAMS ADDED: writeseeds.f, readseeds.f
+    These new programs have been added in the aux directory. Using these a
+    user defined seed file can be created and re-read.
+ NEW VOLUMES ADDED: MSHE, BSPH; PRESSURIZED CONTAINER ADDED
+    Alexey Bakaldin, in MEPHI, did add the PAMELA pressurized container to
+    the simulation. He did defined new volumes filled with aluminum and
+    placed inside the mother volume. Positions have been fine tuned by
+    Marialuigia Ambriola and compared to the CAD drawings.
+    Two new volumes have been added to simulate the container:
+    - MSHE, a tube simulating the middle part of the container
+    - BSPH, the spherical bottom part of the container
+    To better simulate the upper part the SHEL volume has been modified
+    into a cone. Dimentions of the top cover: TSPH, have been modified
+    accordingly.
+ DETECTOR POSITIONS REVIEWED
+    All detector Z positions have been reviewd to fit into the
+    simulated pressurized container.
+ TRD GEOMETRY AND CALIBRATION REVIEWD
+    The TRD geometry has been deeply reviewed. Using the CAD drawings
+    the carbon fiber frames have been simulated and radiator dimentions
+    corrected. For this reason the calibration done on the beam tests
+    has been revied and new sets of calibration constants calculated
+    comparing the beam test data with the GPAMELA results. The new
+    constants are about 3% larger than the previous ones.
+ TRACKER GEOMETRY REVIEWED. NEW VOLUME DEFINED: THBP, TPAS, TPAI
+    Thanks to Lorenzo Bonechi for the drawings and explanations. Now the
+    hybrd cards have been put into the simulation and the geometry updated
+    considering the dead zones in the silicon detectors. The hybrid zone
+    has been simulated as well. At the moment the hybrid is simulated as
+    a G10 plates. The full height of the tracker magnet has been
+    reviewed as well.
+    The tracker ladder is now simulated inside a nitrogen box: TPAS,
+    placed inside an aluminum frame: TRPB. Each silicon ladder has been
+    simulated using two silicon blocks: TRSL, into each of this block a
+    smaller silicon detector: TPAI, has been placed inside the larger
+    silicon block TRSL. In this way the subdivided silicon ladder can
+    be upgraded with an indipendend roto-translation for each sensor.
+    The TRPB aluminum frame has been enlarged to fit the external
+    magnet canister frame.
+    The last plane has been flipped with a 180 degree rotation around
+    the X axis.
+ TRACKER HIT STRUCTURE REVIEWED
+    Taking into account the new version of the tracker geometry, the hit
+    structure for this detector has been revied.
+ CALORIMETER GEOMETRY REVIEWED
+    Marco Albi reviewed the calorimeter dimentions and positioning.
+March 2004, Bari
+ NON-REPRODUCIBILITY PROBLEM OF A GPAMELA RUN FIXED.
+    The non-reproducibility of a GPAMELA run was due to the random number
+    initialization in the GARFIELD code. In GARFIELD by default, the initial
+    seeds of the random number generators are always the same while the random
+    number generators are called a given number of times (determined by the
+    hour of the day) during the initialization phase (see init.f subroutine in
+    the GARFIELD code for details). Follows that different runs produce
+    different results without changing the initial seeds. To have identical
+    results in different runs, the GARFIELD program has to start typing the
+    noRNDM_initialisation switch. To avoid of specifying this switch
+    by the user,
+    the GARFIELD package has been upgraded with a patch. In this way the problem
+    is partially solved because, now, the initial seeds of the random generators
+    in GARFIELD will be always the same even if the RNDM GEANT data card is
+    activated by the user for changing the initial seeds in the GPAMELA program.
+    Work is in progress for a more general correction of this problem.
+    Please, use the updated GARFIELD code released with the CVS version v4r1
+    to fix this problem.
+ RNDM ROUTINE REPLACED BY THE GRNDM ROUTINE IN GPXTR AND NPOISS.
+    The obsolete RNDM random number generator has been replaced by the GEANT
+    GRNDN routine in the gpxtr.F subroutine and in the npoiss.F function.
+ BUG FOUND AND FIXED: the set and detector calorimeter addresses (ISCAL
+    and IDCASI variables) used in GUTREV were respectively set to a fixed
+    values of 12 and 1. The correct values of these variables are stored in
+    the GPSED common when the set and the detector ZEBRA banks are filled
+    during a run. In general the values of the set and detector addresses
+    depend on the number of active detectors in a given run. ISCAL=12 and
+    IDCASI=1 are only right when all the detectors of GPAMELA are active.
+December 2003, Bari
+    CALORIMETER SIMULATION completed! The update of the geometry and of the
+    special tracking parameters and the tuning of the calorimeter have been
+    successfully done. A great quantity of simulated data have been produced
+    in the calorimeter for different particles (muons, electrons and pions)
+    and momenta (5 and 40 GeV/c) and the output data have been analyzed. The
+    distributions of the total energy deposited in the calorimeter and the
+    total number of strips hit have been compared with the respective
+    distributions produced by the Trieste's tuned standalone Monte Carlo
+    simulation program of the PAMELA calorimeter. The accord between the
+    two simulations is excellent. Many thanks to Mirko for his collaboration.
+    Working in progress on TRD. The GARFIELD interface to the HEED program is not
+    optimized to track particle with a charge greater than one and photons. The
+    program print a warning message to advise the user when it is the case.
+April 2003, Bari
+    The buffer size of each column of the GPAMELA Ntuple has been increased to
+and set equal to the record length, defined by a call to the HROPEN
+    routine.
+    Also the length of the common /PAWC/ (parameter NWPAW) has been increased
+    to 1.34E8, according to the rule that it has to be larger than the number
+    of columns times the buffer size.
+April 2003, Bari
+    The variables in the HIT STRUCTURE of the CALORIMETER and their way to be
+    filled have been changed according to the electronics system of the real
+    detector. In fact, because each silicon detector (module) consists of
+strips and each strip is connected to those belonging to the two detectors
+    of the same row (or column) for forming 24 cm long strips, the sum of the
+    deposited energies in the strips forming a `long strip' is now calculated for
+    each event (gpucal.F subroutine) and it is stored in a hit only at the
+    end of the event (gutrev.F subroutine).
+    The output variables of the GPAMELA en-tuple are then filled in the vectors
+    ICAPLANE(NTHCAL), ICASTRIP(NTHCAL), ENESTRIP(NTHCAL) and ICAMOD(NTHCAL),
+    by a call to the GPDCAL subroutine:
+    -ICAPLANE(i) contains the number of hit plane;
+    -ICASTRIP(i) contains the number of hit strip;
+    -ICAMOD(i) can assume different values based on the number of times and
+               positions in which a `long strip' has been hit.
+    -ENESTRIP(i) contains the deposited energy in the hit strip;
+    where i is the number of hit (1<i<4224).
+    Note that in the calorimeter each hit is filled at the end of the event and
+    that there is a hit for each `long strip' hit from
+    the particle. This use of the hit structure is different for the other
+    detectors and it has been considered to avoid a too big number of hit in the
+    calorimeter due to the showers. Follows that NTHCAL, which is the
+    max number of hit in the calorimeter, is equal to 4224, the total
+    number of `long strips'. So, for each event, the real number of hit will
+    be less or equal to 4224.
+    ICAMOD(i) is an additional information that does not exist in the real
+    detector: if the strip i (i=1,32) of the module 1 or 2 or 3
+    is hit, the value of ICAMOD(i) is respectively incremented of 1, 100, 10000.
+    Analogously it is done, if it is the strip j (j=33,64) of the modules 4, 5
+    and 6 or if it is the strip k (k=65,96) of the modules 7, 8 and 9.
+    For example if we consider the hit 1 of an event, we could read:
+    ICASTRIP(1)=30, ICAPLANE(1)=21, ENESTRIP(1)=0.5E-03 and ICAMOD(1)=10001.
+    It means that the hit 1 contains the information that in the strip 30 of the
+    plane 21 has been deposited a total energy of 0.5E-03 GeV. In addition the
+    `long strip 30' has been hit two times, one in the first module and the
+    other in the third one.
+    The energy deposited in the calorimeter is calculated in GeV.
+    To store the hits in the calorimeter the subroutine GSAHIT is used instead of
+    GSCHIT.
+    To retrieve the hit structure the call to the routine GPRHIT is done instead
+    of a call to the GFHITS subroutine.
+February 2003, Bari
+ BUG found:
+    DCUTEAER, DCUTEAL, DCUTECE, DCUTECP, DCUTEFE, DCUTEG10C, DCUTEG10, DCUTEKAP,
+    DCUTEN2G, DCUTEROA, DCUTESCIN, DCUTESICA, DCUTETRAD, DCUTEW2,
+    DCUTEW, DCUTEXE variables missed in the commons: gpaer.inc, gpal.inc, gpce.inc,
+    gpcp.inc, gpfe.inc, gpg10c.inc, gpg10.inc, gpkap.inc, gpn2g.inc, gproa.inc,
+    gpscin.inc (obsolete), gpscint.inc, gpsica.inc, gptrad.inc, gpw2.inc, gpw.inc,
+    gpxe.inc, gpdaer.inc, gpdal.inc, gpdce.inc, gpdcp.inc, gpdfe.inc, gpdg10c.inc,
+    gpdg10.inc, gpdkap.inc, gpdn2g.inc, gpdroa.inc, gpdscin.inc, gpdsica.inc,
+    gpdtrad.inc, gpdw2.inc, gpdw.inc, gpdxe.inc.
+    They have been added in these commons and they have been initialized in the
+    GPSTM subroutine.
+    Updated the special tracking parameters SICALO, TUNGA, KAOLINITE and G10C
+    in the subroutines gpsica.F, gpw2.F, gpw.F, gpce.F and gpg10c.F. They were
+    suggested by Mirko Boezio.
+    Updated the value of the absorption length for silicon in the calorimeter
+    and tracker although this parameter is ignored by GEANT. For this reason
+    it was equal to the radiation length.
+    Updated the relative positions of the calorimeter planes. The corrected
+    shifting are:
+    first view: (Dxo,Dyo)=(0.10,0.05) cm
+    second view: (Dxo,Dyo)=(-0.05,0.10) cm
+    third view: (Dxo,Dyo)=(-0.10,-0.05) cm
+    fourth view: (Dxo,Dyo)=(0.05,-0.10) cm
+November 2002, Bari
+ CAS detectors distances modified
+    The distances between the CAS detectors have been modified based on the
+    latest CAD drawings.
+November 2002, Bari
+ CALORIMETER geometry upgrade
+    The volumes CAPD and CAAD have been taken off from the calorimeter.
+    In addition the logical tree has been slightly changed to make the shifts of
+    the silicon planes into the calorimeter box easier, i.e. the CAPL volume,
+    which was made of the CASI, CAKP, CAGL, C10C and CAKA volumes, has
+    been split up in the volumes CANS and CAPL. Now CANS is made of the CAKP,
+    CAGL, C10C and CAKA volumes while CAPL contains the CASI volume, that has to
+    be shifted as a function of the vertical position in the calorimeter. Also the
+    dimensions of some volumes have been upgraded, including the external ones:
+    CALB and CALS. CALS is an aluminum box of dimensions: 48.4*48.4*21.278 cm^3,
+    having side-walls 1 cm thick and a bottom of 1 mm. The real box is more
+    complicated and the configuration of the bottom should be upgraded if we want
+    a reliable description of the event in the S4 scintillator.
+October 2002, Stockholm
+ ANTICOINC. GEOMETRY UPGRADE
+    The AC geometry has been updated. The top AC scintillator (CAT) now
+    consists of 1 single sheet of scintillator with a hole in the middle
+    and the correct geometry(*). The side AC scintillators (CAS) also
+    have the correct shape. The AC scintillators are placed in aluminum
+    boxes with plastic rims inside. For these rims a 'new' material, PLAS,
+    was defined. PLAS has all the characteristics of SCIN but is
+    non-sensitive. No PMTs or PMT holders have been modelled.
+    (*)-The interfaces on CAT where the PMTs should be located are
+        slightly different from the real case.
 February 2002, Bari
  MACRO CLEAN-UP
-Line 116 
 TRACK COMMAND CALLED BY GPGARIN
+Line 641 
 TRACK COMMAND CALLED BY GPGARIN
  TRD IONIZATION ENERGY LOSS GENERATED NOW BY GARFIELD
     To generate the ionization in the TRD straw tubes the HEED program
-    interfaced by GARFIELD is used (GEANT does not simulate the ionization
+    interfaced by GARFIELD is used (GEANT does not correctly simulate
-    in thin layer and in the gas, correctly). The idea is that GEANT tracks
+    the ionization in thin layer and in the gas). The idea is that GEANT
-    the particle in the gas and then passes the coordinates, translated in
+    tracks the particle in the gas and then passes the coordinates,
-    the DRS, to GARFIELD. The GARFIELD subroutines are called by GPUTRD.
+    translated in the DRS, to GARFIELD. The GARFIELD subroutines are
-    The energy loss and the number of clusters in TRD are stored in the
+    called by GPUTRD. The energy loss and the number of clusters in TRD
-    variables EGARTRD and NGARTRD of the CWN-tplu.
+    are stored in the variables EGARTRD and NGARTRD of the CWN-tplu.
 May 2001, Bari
-Line 200 
 NEW SEQUENCES ADDED: $XPRINTPLOT,$PRINTP
+Line 725 
 NEW SEQUENCES ADDED: $XPRINTPLOT,$PRINTP
     The definition of the ITRSO detector has been changed in the GPSED routine:
     NVTRD has been forced to 2 for compatibility with GPDTRD.
-april 2001, Bari
 march 2001, Bari
     ITRSO has been defined as a sensitive detector in GSTMED routine and it has

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