Inheritance diagram for GCOMIaq::response_kernel:

Public Member Functions
	response_kernel (const GCOMD1Response &response_d1, const GCOMD2Response &response_d2, const double &etrue1, const double &etrue2, const double &phibar, const double &etmin, const double &etmax, const double &e1min, const double &e1max, const double &e2min, const double &e2max)

double	eval (const double &energy1)
	Computes product of D1 and D2 responses at energy E1 and phibar. More...

Public Member Functions inherited from GFunction
	GFunction (void)
	Void constructor. More...

	GFunction (const GFunction &function)
	Copy constructor. More...

virtual	~GFunction (void)
	Destructor. More...

GFunction &	operator= (const GFunction &function)
	Assignment operator. More...

Protected Attributes
const GCOMD1Response &	m_response_d1
	Reference to D1 module response. More...

const GCOMD2Response &	m_response_d2
	Reference to D2 module response. More...

double	m_etrue1
	True D1 energy (MeV) More...

double	m_etrue2
	True D2 energy (MeV) More...

double	m_cos_phibar
	cos(phibar) More...

double	m_sin_phibar
	sin(phibar) More...

double	m_etmin
	Minimum total energy (MeV) More...

double	m_etmax
	Maximum total energy (MeV) More...

double	m_e1min
	Minimum D1 energy (MeV) More...

double	m_e1max
	Maximum D1 energy (MeV) More...

double	m_e2min
	Minimum D2 energy (MeV) More...

double	m_e2max
	Maximum D2 energy (MeV) More...

Additional Inherited Members
Protected Member Functions inherited from GFunction
void	init_members (void)
	Initialise class members. More...

void	copy_members (const GFunction &function)
	Copy class members. More...

void	free_members (void)
	Delete class members. More...

Detailed Description

Definition at line 97 of file GCOMIaq.hpp.

Constructor & Destructor Documentation

GCOMIaq::response_kernel::response_kernel	(	const GCOMD1Response &	response_d1,
		const GCOMD2Response &	response_d2,
		const double &	etrue1,
		const double &	etrue2,
		const double &	phibar,
		const double &	etmin,
		const double &	etmax,
		const double &	e1min,
		const double &	e1max,
		const double &	e2min,
		const double &	e2max
	)

inline

Definition at line 99 of file GCOMIaq.hpp.

Member Function Documentation

double GCOMIaq::response_kernel::eval ( const double & energy1 )

virtual

Computes product of D1 and D2 responses at energy E1 and phibar.

Parameters

[in] energy1 D1 energy deposit (MeV).

The method computes

\[ R(E_1,E_2|\hat{E_1},\hat{E_2}) = R_1(E_1|\hat{E_1}) \times R_2(E_2|\hat{E_2}) \times J \]

where \(R_1(E_1|\hat{E_1})\) is the D1 module response function, \(R_2(E_2|\hat{E_2})\) is the D2 module response function, \(E_1\) and \(E_2\) are the measured D1 and D2 energy deposits, respectively, \(\hat{E_1}\) and \(\hat{E_2}\) are the true D1 and D2 energy deposits, respectively, and \(J\) is the Jacobian.

The measured D2 energy deposit is computed using

\[ E_2 = \frac{1}{2} \times \left( \sqrt{\frac{4 m_e c^2 E_1}{1 - \cos \bar{\varphi}} + E_1^2} - E_1 \right) \]

where \(m_e\,c^2\) the electron rest mass, and \(\bar{\varphi}\) the Compton scatter angle.

The Jacobian is given by

\[ J = \frac{m_e c^2 \sqrt{E_1} \sin \bar{\varphi}} {(1 - \cos \bar{\varphi})^2 \sqrt{\frac{4 m_e c^2}{1 - \cos \bar{\varphi}} + E_1}} \]

The code implementation is based on the COMPASS RESPSIT2 function FUNC.F (release 4.0, 21-Oct-91).

Implements GFunction.

Definition at line 1605 of file GCOMIaq.cpp.

References abs(), m_cos_phibar, m_e1max, m_e1min, m_e2max, m_e2min, m_etmax, m_etmin, m_etrue1, m_etrue2, m_response_d1, m_response_d2, m_sin_phibar, gammalib::mec2, pow(), and sqrt().

Member Data Documentation

double GCOMIaq::response_kernel::m_cos_phibar

protected

cos(phibar)

Definition at line 128 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_e1max

protected

Maximum D1 energy (MeV)

Definition at line 133 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_e1min

protected

Minimum D1 energy (MeV)

Definition at line 132 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_e2max

protected

Maximum D2 energy (MeV)

Definition at line 135 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_e2min

protected

Minimum D2 energy (MeV)

Definition at line 134 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_etmax

protected

Maximum total energy (MeV)

Definition at line 131 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_etmin

protected

Minimum total energy (MeV)

Definition at line 130 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_etrue1

protected

True D1 energy (MeV)

Definition at line 126 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_etrue2

protected

True D2 energy (MeV)

Definition at line 127 of file GCOMIaq.hpp.

Referenced by eval().

const GCOMD1Response& GCOMIaq::response_kernel::m_response_d1

protected

Reference to D1 module response.

Definition at line 124 of file GCOMIaq.hpp.

Referenced by eval().

const GCOMD2Response& GCOMIaq::response_kernel::m_response_d2

protected

Reference to D2 module response.

Definition at line 125 of file GCOMIaq.hpp.

Referenced by eval().

double GCOMIaq::response_kernel::m_sin_phibar

protected

sin(phibar)

Definition at line 129 of file GCOMIaq.hpp.

Referenced by eval().

The documentation for this class was generated from the following files:

inst/com/include/GCOMIaq.hpp
inst/com/src/GCOMIaq.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation