Name space for KM3NeT. More...

Functions
const JK40Rates &	getK40Rates ()
	Get K40 rates.

double	getAmbientPressure ()
	Get ambient pressure.

double	getPhotocathodeArea ()
	Get photo-cathode area of KM3NeT PMT.

double	getAbsorptionLength (const double lambda)
	Get absorption length.

double	getScatteringLength (const double lambda)
	Get scattering length.

double	getScatteringProbability (const double x)
	Function to describe light scattering in water.

double	getAngularAcceptance (const double x)
	Get angular acceptance of KM3NeT PMT.

double	getQE (const double lambda)
	Get quantum efficiency of KM3NeT PMT.

double	getPhotocathodeArea2D (const double x, const double lambda)
	Get effective photo-cathode area of PMT.

void	setClock ()
	Set clock.

Detailed Description

Name space for KM3NeT.

Function Documentation

◆ getK40Rates()

const JK40Rates & KM3NET::getK40Rates ( )

inline

Get K40 rates.

This method returns an object with default values.
The singles rate is based on the value quoted on slide 13 of this presentation.
Multiplicity rates are obtatined with $JPP_DIR/examples/JCalibrate/JOMGsim.sh type A processing,
see $JPP_DIR/examples/JCalibrate/README.md
See also KM3NeT internal note.

Returns: K40 rates [Hz]

Definition at line 39 of file KM3NeT.hh.

  {
    static const JK40Rates rates_Hz(6200, {  593.39,  55.22,   6.07,   0.60  });
 
    return rates_Hz;
  }

◆ getAmbientPressure()

double KM3NET::getAmbientPressure ( )

inline

Get ambient pressure.

Returns: pressure [Atm]

Definition at line 52 of file KM3NeT.hh.

  {
    return 240.0;    // ambient pressure [Atm]
  }

◆ getPhotocathodeArea()

double KM3NET::getPhotocathodeArea ( )

inline

Get photo-cathode area of KM3NeT PMT.

Returns: photo-cathode area [m^2]

Definition at line 63 of file KM3NeT.hh.

  {
    return 70.768818 * 1.0e-4;              // photo-cathode area [m^2]
  }

◆ getAbsorptionLength()

double KM3NET::getAbsorptionLength ( const double lambda )

inline

Get absorption length.

Parameters

lambda wavelength of light [nm]

Returns: absorption length [m]

Definition at line 75 of file KM3NeT.hh.

  {
    static JPolint1Function1D_t f1;
 
    if (f1.empty()) {
 
      f1[290] =   0.0;
      f1[310] =  11.9;
      f1[330] =  16.4;
      f1[350] =  20.6;
      f1[375] =  29.5;
      f1[412] =  48.5;
      f1[440] =  67.5;
      f1[475] =  59.0;
      f1[488] =  55.1;
      f1[510] =  26.1;
      f1[532] =  19.9;
      f1[555] =  14.7;
      f1[650] =   2.8;
      f1[676] =   2.3;
      f1[715] =   1.0;
      f1[720] =   0.0;
 
      f1.compile();
 
      f1.setExceptionHandler(new JPolint1Function1D_t::JDefaultResult(0.0));
    }
 
    return f1(lambda);
  }

◆ getScatteringLength()

double KM3NET::getScatteringLength ( const double lambda )

inline

Get scattering length.

Use the Kopelevich model for spectral volume scattering functions.
The model separates the contributions by:

pure_sea: pure sea water;
small_par: 'small' particles (size < 1 micro meter);
large_par: 'large' particles (size > 1 micro meter). Values are taken from reference C.D. Mobley "Light and Water", ISBN 0-12-502750-8, pag. 119.

Parameters

lambda wavelength of light [nm]

Returns: scattering length [m]

Definition at line 121 of file KM3NeT.hh.

  {
    static const double Vs = 0.0075;
    static const double Vl = 0.0075;
    static const double bw = 0.0017;
    static const double bs = 1.340;
    static const double bl = 0.312;
 
    const double x = 550.0/lambda;
 
    const double pure_sea  = bw *      pow(x, 4.3);
    const double small_par = bs * Vs * pow(x, 1.7);
    const double large_par = bl * Vl * pow(x, 0.3);
 
    return 1.0 / (pure_sea + small_par + large_par);
  }

◆ getScatteringProbability()

double KM3NET::getScatteringProbability ( const double x )

inline

Function to describe light scattering in water.

Parameters

x	cosine scattering angle

Returns: probability

Definition at line 145 of file KM3NeT.hh.

  {
    return JPHYSICS::p00075(x);
  }

◆ getAngularAcceptance()

double KM3NET::getAngularAcceptance ( const double x )

inline

Get angular acceptance of KM3NeT PMT.

Parameters

x	cosine of angle of incidence

Returns: probability

Definition at line 157 of file KM3NeT.hh.

  {
    static JGridPolint1Function1D_t f1;
 
    if (f1.empty()) {
 
      f1[-1.00] = 1.0000;
      f1[-0.95] = 0.8301;
      f1[-0.90] = 0.7357;
      f1[-0.85] = 0.6619;
      f1[-0.80] = 0.5998;
      f1[-0.75] = 0.5410;
      f1[-0.70] = 0.4874;
      f1[-0.65] = 0.4387;
      f1[-0.60] = 0.3947;
      f1[-0.55] = 0.3544;
      f1[-0.50] = 0.3190;
      f1[-0.45] = 0.2777;
      f1[-0.40] = 0.2445;
      f1[-0.35] = 0.2101;
      f1[-0.30] = 0.1818;
      f1[-0.25] = 0.1535;
      f1[-0.20] = 0.1276;
      f1[-0.15] = 0.1025;
      f1[-0.10] = 0.0788;
      f1[-0.05] = 0.0586;
      f1[0.00] = 0.0400;
      f1[0.05] = 0.0233;
      f1[0.10] = 0.0104;
      f1[0.15] = 0.0039;
      f1[0.20] = 0.0017;
      f1[0.25] = 0.0000;
 
      f1.compile();
 
      f1.setExceptionHandler(new JGridPolint1Function1D_t::JDefaultResult(0.0));
    }
 
    return f1(x);
  }

◆ getQE()

double KM3NET::getQE ( const double lambda )

inline

Get quantum efficiency of KM3NeT PMT.

Note that the QE includes absorption in glass and gel as well as the collection efficiency.

Parameters

lambda wavelength of photon [nm]

Returns: quantum efficiency

Definition at line 207 of file KM3NeT.hh.

  {
    static JGridPolint1Function1D_t f1;
    static const double cola    = 1.0;      // collection efficiency
 
    if (f1.empty()) {
 
      f1[290] = 0.000;
      f1[300] = 0.000;
      f1[310] = 1.860;
      f1[320] = 7.721;
      f1[330] = 15.912;
      f1[340] = 21.981;
      f1[350] = 24.729;
      f1[360] = 26.476;
      f1[370] = 27.525;
      f1[380] = 27.213;
      f1[390] = 28.295;
      f1[400] = 27.973;
      f1[410] = 27.435;
      f1[420] = 26.905;
      f1[430] = 26.527;
      f1[440] = 25.978;
      f1[450] = 25.203;
      f1[460] = 23.898;
      f1[470] = 22.252;
      f1[480] = 20.827;
      f1[490] = 19.997;
      f1[500] = 19.326;
      f1[510] = 18.546;
      f1[520] = 16.584;
      f1[530] = 13.321;
      f1[540] = 10.680;
      f1[550] = 9.096;
      f1[560] = 7.924;
      f1[570] = 7.131;
      f1[580] = 6.252;
      f1[590] = 5.373;
      f1[600] = 4.577;
      f1[610] = 3.738;
      f1[620] = 3.111;
      f1[630] = 2.442;
      f1[640] = 1.947;
      f1[650] = 1.578;
      f1[660] = 1.270;
      f1[670] = 0.907;
      f1[680] = 0.626;
      f1[690] = 0.435;
      f1[700] = 0.252;
      f1[710] = 0.000;
      f1[720] = 0.000;
 
      f1.compile();
 
      f1.setExceptionHandler(new JGridPolint1Function1D_t::JDefaultResult(0.0));
    }
 
    return f1(lambda) * 0.01 * cola;
  }

◆ getPhotocathodeArea2D()

double KM3NET::getPhotocathodeArea2D	(	const double	x,
		const double	lambda )

inline

Get effective photo-cathode area of PMT.

Parameters

x	cosine of angle of incidence
lambda	wavelength of photon [nm]

Returns: photo-cathode area [m^2]

Definition at line 275 of file KM3NeT.hh.

  {
    return getPhotocathodeArea() * getQE(lambda) * getAngularAcceptance(x);
  }

◆ setClock()

void KM3NET::setClock ( )

inline

Set clock.

Definition at line 314 of file JDAQClock.hh.

  {
    KM3NETDAQ::JDAQClock clock(KM3NETDAQ::JDAQClock::KM3NET);
  }

Functions

Detailed Description

Function Documentation

◆ getK40Rates()

◆ getAmbientPressure()

◆ getPhotocathodeArea()

◆ getAbsorptionLength()

◆ getScatteringLength()

◆ getScatteringProbability()

◆ getAngularAcceptance()

◆ getQE()

◆ getPhotocathodeArea2D()

◆ setClock()