[ Identification | Description | Input parameters | Links ]

The ATHENA_1mm Instrument

Single pore version of the ATHENA SPO-optic in use as telescope.

Identification

Description

A model of the ATHENA-telescope using just a single mirror module as optical element. That means to make use of this instrument
it is necessary to run a series of simulation while varying the input parameter porenumber.
At present, the porenumber really means mirror module number.

The model needs as input two files positionfile and geomfile, which contain (in ascii) tabled details about the positions of mirror
modules and their geometry.
The data in the position file is assumed to be columnar with the following format:
#index   row    X/m    Y/m    R/m    alpha/deg.
...

index: a running number identifying the mirror module within a petal.
row: the a running number for which row (ring) this mirror module belongs to (n.b. this is used as an index inot the geomfile).
X: The x-coordinate of the mirror module (ignored because redundant with R,alpha)
Y: The y-coordinate of the mirror module (ignored because redundant with R,alpha)
R: The radial position of the mirror module
alpha: The angular position of the mirror module

Similarly the format of the geomfile is:
#row  L/m  rad_h/m  rad_m/m  rad_p/m  width/m
...
row: running index for the rows/rings
L: The length of the plates for this ring
rad_h: The radius at the "hyperbolic" end of the optic. At the detector end.
rad_m: The radius at the midpoint of the optic. This is the reference.
rad_p: The radius at the "parabolic" and of the optic. At the source end.
width: pore width ?

Example: ATHENA_1mm.instr porenumber=3

Input parameters

Parameters in boldface are required; the others are optional.
NameUnitDescriptionDefault
FLmThe focal length of the optical system12
optics_distmThe distance between souce and optic. In space this would be quite large :-).10
SRC_POS_XmDisplacement of source along X0
SRC_POS_YmDisplacement of source along Y0
offaxis_anglearcminAngle of collimated light from source0
dPxmOffset/displacement of parabolic pore along x from its theoretical position.0
dPymOffset/displacement of parabolic pore along y from its theoretical position.0
dPzmOffset/displacement of parabolic pore along z from its theoretical position.0
dPrxarcsecRotational misalignment of parabolic pore around x.0
dPryarcsecRotational misalignment of parabolic pore around y.0
dPrzarcsecRotational misalignment of parabolic pore around z.0
dHxmOffset/displacement of hyperbolic pore along x from its theoretical position.0
dHymOffset/displacement of hyperbolic pore along y from its theoretical position.0
dHzmOffset/displacement of hyperbolic pore along z from its theoretical position.0
dHrxarcsecRotational misalignment of hyperbolic pore around x.0
dHryarcsecRotational misalignment of hyperbolic pore around y.0
dHrzarcsecRotational misalignment of hyperbolic pore around z.0
reflectivity Data file containing reflectivities (such as from IMD)"mirror_coating_unity.txt"
E0keVCentral energy of X-rays5
dEkeVHalf spread of energy spectrum to be emitted from source0.001
porenumber Actually the mirror module number.1
ringfile"ref_design_breaks.txt"
positionfile File containing the pore/mirror module positions."ATHENA_mm_1petal.dat"
geomfile File which contains the geometry of the pores (i.e. radii,lengths)"ATHENA_rings_1_20.dat"
Hyper If non-zero the secondary mirror (hyperbolic) is active. Useful for debugging.1
Para If non-zero the primary mirror is acive (parabolic) is active. Useful for debugging.1

Links


[ Identification | Description | Input parameters | Links ]

Generated on 2024-07-01 12:32:10