SPECSOUR

Summary

defines one of the following special sources:

  • two colliding beams

  • Galactic Cosmic Rays

  • Solar Particle Event

  • synchrotron radiation

  • USRBIN as source

  • multiple beams

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See also BEAM, BEAMAXES, BEAMPOSit, GCR–SPE, HI–PROPErt, POLARIZAti, SOURCE, USRICALL, USRGCALL, SPOTBEAM, SPOTPOS, SPOTDIR, SPOTTRAN, SPOTTIME
This option allows to input up to 18 double precision parameters, depending on the option specified by SDUM. A first continuation card, if required, is marked by a “&” in any position in column 71 to 78, or in the last field if free format is used. A possible second continuation card is similarly marked by “&&”

For SDUM = PPSOURCE or ppsource, or CROSSASY or CROSSSYM, the source is produced by two colliding beams. The description of these options is presented separately in Special source: colliding beams.

Cosmic ray sources are requested by one of the following SDUM values:

  • Galactic Cosmic Rays: GCR–AMS, GCR–IONF, GCR–SPEC, GCR–ALLF

  • Solar Particle Events: SPE–SPEC, SPE–2003, SPE–2005

The description of these options is presented separately in Special source: cosmic rays.

For SDUM = SYNC-RAD, SYNC-RDN, SYNC-RAS, or SYNC-RDS, the source consists in synchrotron radiation photons produced by a charged particle travelling in a magnetic field. A description of this option is presented separately in Special source: synchrotron radiation.

For SDUM = BEAMSPOT, the source consists of multiple beam spots. The user defines though the cards SPOTBEAM, SPOTPOS, SPOTDIR, SPOTTIME and SPOTTRAN the locations, directions and beam characteristics of those sources. In this case, the card needs as WHAT(1) the number of beam spots that are used. The user can define up to 50000 beam spots

WHAT(1) > 0.0:

Number of beam spots in the simulation

≤ 0.0:

The code stops

Default

no default

WHAT(2) ≥ 0.0:

The beam spots are sampled randomly, according to their weights

= 1.0:

The beam spots are sampled sequentially, each with a number of primaries proportional to its weight

= 2.0:

The beam spots are sampled sequentially, all with the same number of primaries, ignoring their weights

Default 0.0

If SDUM = BIN-SOUR, a USRBIN detector is used to define the spatial distribution of the primaries. The primary type is still defined through the BEAM card. Nota Bene :

  • The type of particles scored in the USRBIN is irrelevant to the primaries being launched through BIN-SOUR.

  • This option can only be used with a cartesian USRBIN.

WHAT(1)

logical unit in which to read the USRBIN file

Default

no default

WHAT(2)

detector index in the specified USRBIN file

Default

no default

WHAT(3)

Rotation translation matrix to be applied before sampling

Default

no default

WHAT(4)

Rotation translation matrix to be applied after sampling

Default

no default