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// Fully absorbative Grey Disc (Black disc) for testing
{
type: "GREY_DISC_PARAMETERS",
version: 1,
index: "DiscOptics0_black",
run_range: [0, 0],
pass: 0,
comment: "",
timestamp: "",
travel_time: 0.25,
decay_constant: 0.25,
disc_radius: 137.7,
collection_efficiency: 1.3909,  // DocDB 4741-v8

// The following parameters define the reflection model
// Modeling the reflections turned out to be complex -- see document SNO+-doc-4337

// Description of the PMT as an ellipsoid
pmt_ellipsoid_a: 101.85,
pmt_ellipsoid_b: 75.15,
pmt_ellipsoid_minz_contact: 26.,

// Model of number of reflections (PMT and CONC hits)
reflection_model_pmt_nreflections_rotation: 1.56686777558,
reflection_model_pmt_nreflections_coeffs: [-5.89, 12.14,  -5.613],
reflection_model_conc_nreflections_coeffs: [-1.547, 4.62, -5.108, 2.455, -0.4318, 0.8755],

// Hit PMT first, leave in a single reflection
reflection_model_spmt_trot: 0.785398,
reflection_model_spmt_tspread: 0.1368,
reflection_model_spmt_tmean: 0.5556,
reflection_model_spmt_pflat: 0.726,
reflection_model_spmt_pspread: 0.4622,
reflection_tdelay_spmt: 100., // Contact time/ factor

// Hit PMT first, leave after multiple reflections
reflection_model_mpmt_trot: 0.603749,
reflection_model_mpmt_tmean: 0.5106,
reflection_model_mpmt_tspread: 0.0838, 

reflection_model_mpmt_pspread: [0.009213, 0.1155], // c1*x + c2 (x is radius)
reflection_model_mpmt_pmean: [0.028, 2.5], // c1*x + c2 (x is radius)
reflection_tdelay_mpmpt: 90., // Contact time factor

// Hit the CONCENTRATOR first, leave after single reflections
reflection_model_conc_tspread: 0.08,
reflection_model_conc_coeffs: [0.003991, 0.2364, 0.008317, 3.255],
reflection_model_mconc_pspread: 0.05,
reflection_model_mconc_pdiffuse: 0., // Set diffusiveness of concentrators (1=completely diffuse)
reflection_tdelay_sconc : [15.12, -13.8, -6.292, 6.94, 0.7043],
reflection_tdelay_sconc_max : [0.8, 1.358],
reflection_tdelay_mconc : [-19356.9021, 106776.7463, -250656.8864, 326762.7911, -259110.3902, 128914.3325, -40156.7876, 7610.7330, -834.2479, 51.7195, 0.0437],

// Global time delay spread
reflection_tdelay_spread : 0.23, // nanoseconds

// End of reflection model

// Below follows Two huge (50*90=4500) blocks of absorption probability and reflection probability taken from SNOMAN
absorption_probability: [ 1.0 : 4500 ],
reflection_probability: [ 0.0 : 4500 ],
}