Gabriele Cosmo
160 lines
6.7 KiB
Plaintext
160 lines
6.7 KiB
Plaintext
$Id: History,v 1.8 2001/03/19 12:13:38 japost Exp $
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-------------------------------------------------------------------
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=========================================================
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Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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=========================================================
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Category History file
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---------------------
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This file should be used by G4 developers and category coordinators
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to briefly summarize all major modifications introduced in the code
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and keep track of all category-tags.
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It DOES NOT substitute the CVS log-message one should put at every
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committal in the CVS repository !
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----------------------------------------------------------
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* Reverse chronological order (last date on top), please *
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----------------------------------------------------------
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Mar 19, 2001 J. Apostolakis transport-V03-00-01
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------------------------------
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G4Transportation modified to use new FieldTrack, and get Kinetic Energy from it.
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This new FieldTrack together with changes in associated Equation of Motion
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classes implement the momentum vector as independent variable in place of the
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velocity.
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So this tag requires
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- new geometry/magneticfield tag "field-V03-00-01", and
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- new geometry/volumes tag "geomvol-V03-00-03" for new G4PropagatorInField ().
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Feb 27, 2001 J. Apostolakis (transport-V03-00-00)
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------------------------------
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- G4Transportation.cc:
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* Modified calculation of energy at the end of field step
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to make it more accurate at low velocities,
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(while remaining correct at high gammas).
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This improves the energy determination.
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Together with electromagnetic/standard tag "stand-V03-00-03"
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this addresses the main problem in propagating in an electric field
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(Problem report # 108 )
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Sep 22, 2000 V. Grichine (transport-V02-00-00) [recorded by G.Cosmo]
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---------------------------
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- G4Transportation.cc:
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o added formula for Tkin corresponding directly to
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relativistic definition of Tkin = Etot - mc^2 = mc^2(gamma -1),
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where gamma is a particle Lorentz factor.
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o general cosmetics.
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Jun 19, 2000 J. Apostolakis (transport-V01-01-02)
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------------------------------
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- G4Transportation.cc: Set the True Step Length in G4Transportation.cc
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- Cosmetic: updated other files to the head, as there were no differences
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from it (CVS headers).
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May 15, 2000 J. Apostolakis (transport-V01-01-01)
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------------------------------
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- G4Transportation.cc: Set the material in materialChange, in order to get
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correct behaviour for volumes that parameterise the material.
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(Fix is dependant on changes to particleChangeForTransport and StepPoint)
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- Modified setting of touchable change, in order to preserve const-ness where
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it exists.
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Nov 25, 1999 J. Apostolakis (transport-V00-01-01)
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------------------------------
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- G4Transportation.cc: Added protection for the case of a zero step (when
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there is a field)
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- G4UserSpecialCuts: protection to use min range and min kinE only for
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charged particles.
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June 9, 1999 J. Apostolakis (transport-01-00-02)
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------------------------------
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- Added a protection so that full relocation is not used for very small moves.
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Dec 4, 1998 J. Apostolakis (transport-00-04-01)
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------------------------------
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- The Velocity Vector for Transport in a magnetic field is now set correctly.
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(previously the scalar velocity was automatically promoted to a 3-vector)
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Nov 25, 1998 J. Apostolakis
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-----------------------------
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- Added the direction to LocateGlobalPointAndUpdateTouchable.
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Nov 19, 1998 J. Apostolakis (transport-00-03-04)
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------------------------------
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- Fixes:
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1) The final energy is set equal to the initial energy, because
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the PropagatorInField does not calculate it correctly yet. NEEDS Fix
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2) If the requested step size is zero and safety is zero, the
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step is now considered geometry limited. (This can happen
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if a discrete process tries to take a step that is very small
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compared to the mean free path.) Problem observed by Laszlo in EM tests.
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3) PostStepGetInteractionLength now returns DBL_MAX, not kInfinity.
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Nov 11, 1998 J. Apostolakis (transport-00-03-03)
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------------------------------
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- Changes to accomodate new interface of Field:
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G4PropagatorInField and G4FieldTrack.
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Oct 30, 1998 J. Apostolakis (transport-00-03-02)
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-----------------------------
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- In the case of magnetic field, a flag that determines whether the
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geometry limited the step was not set.
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Sep 16, 1998 J. Apostolakis (transport-00-03-01)
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-----------------------------
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- Checks whether the particle is out of the world volume,
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if so it has exited and must be killed.
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Aug 28, 1998 J. Apostolakis
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-----------------------------
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- The PostStepGetPhysicalInteractionLength has fixed (to return kInf)
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The boolean flags for touchables are now initialised. & Other small fixes ?
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Test code for non-relocating case added (for debugging).
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June 08, 1998 J. Apostolakis (trans-06-04)
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------------------------------
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- Corrected Safety computation for the case of the field (adding endpoint
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distance instead of curve length.)
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- Added PostStepDoIt method that tries to relocate the particle using
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G4ParticleChangeForTransport
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- Transportation is no longer a G4ContinuousProcess.
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June 08, 1998 J. Apostolakis (trans-06-03)
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------------------------------
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- Modified it to recomputate Safety at the start of a step. To do this
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it uses the previous step's calculated safety and endpoint.
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June 08, 1998 J. Apostolakis (trans-06-02)
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------------------------------
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- Modified it to add re-computation of Safety at the endpoint of a step,
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when the safety would become negative. This is done to allow processes
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to benefit from a realistic (geometrical) value of the safety. The
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request to do this was from EM physics
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June 03, 1998 J. Apostolakis (trans-06-01)
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------------------------------
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- The safety we is now generalised to mean the limit of assumption of all
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processes. The AlongStepGPIL input value is not the remainder from the
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previous step's geometrical safety.
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So the transportation must recalculate the starting point's safety here.
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As a zeroeth order approximation we set it to zero.
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April 17, 1998 M. Maire [recorded by John Apostolakis]
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------------------------
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- A new process, G4UserSpecialCuts, was added to allow the
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user an alternative method to set some user cuts.
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April 15, 1998 H. Kurasige [recorded by John Apostolakis]
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---------------------------
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- The transportation does the absolute minimum required to conform to
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the new scheme for ParticleChange: G4VParticleChange is used in signature.
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[ But default G4ParticleChange is still used ].
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April 14, 1998 John Apostolakis
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--------------------------------
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- History file Created
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