impactx::elements::Buncher Struct Reference

#include <Buncher.H>

Inheritance diagram for impactx::elements::Buncher:

Public Types
using	PType = ImpactXParticleContainer::ParticleType

Public Member Functions
	Buncher (amrex::ParticleReal V, amrex::ParticleReal k, amrex::ParticleReal dx=DEFAULT_dx, amrex::ParticleReal dy=DEFAULT_dy, amrex::ParticleReal rotation_degree=DEFAULT_rotation_degree, std::optional< std::string > name=DEFAULT_name)
void	reverse ()
void	compute_constants (RefPart const &refpart)
template<typename T_Real = amrex::ParticleReal, typename T_IdCpu = uint64_t>
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE void	operator() (T_Real const &AMREX_RESTRICT x, T_Real const &AMREX_RESTRICT y, T_Real const &AMREX_RESTRICT t, T_Real &AMREX_RESTRICT px, T_Real &AMREX_RESTRICT py, T_Real &AMREX_RESTRICT pt, T_IdCpu const &AMREX_RESTRICT idcpu, RefPart const &AMREX_RESTRICT refpart) const
AMREX_GPU_HOST AMREX_FORCE_INLINE Map6x6	transport_map (RefPart const &AMREX_RESTRICT refpart) const
Public Member Functions inherited from impactx::elements::mixin::Named
AMREX_GPU_HOST void	set_name (std::string const &new_name)
AMREX_GPU_HOST	Named (std::optional< std::string > name)
AMREX_GPU_HOST_DEVICE	~Named ()
AMREX_GPU_HOST	Named (Named const &other)
AMREX_GPU_HOST Named &	operator= (Named const &other)
AMREX_GPU_HOST_DEVICE	Named (Named &&other) noexcept
AMREX_GPU_HOST_DEVICE Named &	operator= (Named &&other) noexcept
AMREX_FORCE_INLINE std::string	name () const
AMREX_FORCE_INLINE bool	has_name () const
Public Member Functions inherited from impactx::elements::mixin::BeamOptic< Buncher >
void	operator() (ImpactXParticleContainer &pc, int step, int period)
Public Member Functions inherited from impactx::elements::mixin::LinearTransport< Buncher >
AMREX_GPU_HOST AMREX_FORCE_INLINE void	operator() (Map6x6 &AMREX_RESTRICT cm, RefPart const &AMREX_RESTRICT ref) const
Public Member Functions inherited from impactx::elements::mixin::Thin
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE void	operator() (RefPart &AMREX_RESTRICT refpart) const
void	reverse ()
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE int	nslice () const
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE amrex::ParticleReal	ds () const
Public Member Functions inherited from impactx::elements::mixin::Alignment
	Alignment (amrex::ParticleReal dx, amrex::ParticleReal dy, amrex::ParticleReal rotation_degree)
	Alignment ()=default
	Alignment (Alignment const &)=default
Alignment &	operator= (Alignment const &)=default
	Alignment (Alignment &&)=default
Alignment &	operator= (Alignment &&rhs)=default
	~Alignment ()=default
void	compute_constants (RefPart const &refpart)
template<typename T_Real>
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE void	shift_in (T_Real &AMREX_RESTRICT x, T_Real &AMREX_RESTRICT y, T_Real &AMREX_RESTRICT px, T_Real &AMREX_RESTRICT py) const
template<typename T_Real>
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE void	rotate_in (T_Real &AMREX_RESTRICT sx, T_Real &AMREX_RESTRICT sy) const
template<typename T_Real>
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE void	shift_out (T_Real &AMREX_RESTRICT x, T_Real &AMREX_RESTRICT y, T_Real &AMREX_RESTRICT px, T_Real &AMREX_RESTRICT py) const
template<typename T_Real>
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE void	rotate_out (T_Real &AMREX_RESTRICT sx, T_Real &AMREX_RESTRICT sy) const
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE amrex::ParticleReal	dx () const
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE amrex::ParticleReal	dy () const
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE amrex::ParticleReal	rotation () const
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE bool	misaligned () const
AMREX_GPU_HOST AMREX_FORCE_INLINE Map6x6	rotation_map () const
AMREX_GPU_HOST AMREX_FORCE_INLINE Map6x6	rotate_aligned_map (Map6x6 const &R) const
Public Member Functions inherited from impactx::elements::mixin::NoFinalize
void	finalize ()

Public Attributes
amrex::ParticleReal	m_V
amrex::ParticleReal	m_k
	normalized (max) RF voltage drop.
Public Attributes inherited from impactx::elements::mixin::Alignment
amrex::ParticleReal	m_dx = 0
amrex::ParticleReal	m_dy = 0
	horizontal translation error [m]
amrex::ParticleReal	m_rotation = 0
	vertical translation error [m]

Static Public Attributes
static constexpr auto	type = "Buncher"
Static Public Attributes inherited from impactx::elements::mixin::Named
static constexpr std::nullopt_t	DEFAULT_name = std::nullopt
Static Public Attributes inherited from impactx::elements::mixin::LinearTransport< Buncher >
static constexpr bool	has_linear_transport
Static Public Attributes inherited from impactx::elements::mixin::Alignment
static constexpr amrex::ParticleReal	degree2rad
static constexpr amrex::ParticleReal	DEFAULT_dx = 0
static constexpr amrex::ParticleReal	DEFAULT_dy = 0
static constexpr amrex::ParticleReal	DEFAULT_rotation_degree = 0

Private Attributes
amrex::ParticleReal	m_neg_kV
	RF wavenumber in 1/m.
amrex::ParticleReal	m_kV_r2bg2
	-m_k*m_V

Member Typedef Documentation

PType

using impactx::elements::Buncher::PType = ImpactXParticleContainer::ParticleType

Constructor & Destructor Documentation

Buncher()

impactx::elements::Buncher::Buncher ( amrex::ParticleReal V, amrex::ParticleReal k, amrex::ParticleReal dx = DEFAULT_dx, amrex::ParticleReal dy = DEFAULT_dy, amrex::ParticleReal rotation_degree = DEFAULT_rotation_degree, std::optional< std::string > name = DEFAULT_name )

inline

A short RF cavity element at zero crossing for bunching

Parameters

V	Normalized RF voltage drop V = Emax*L/(c*Brho)
k	Wavenumber of RF in 1/m
dx	horizontal translation error in m
dy	vertical translation error in m
rotation_degree	rotation error in the transverse plane [degrees]
name	a user defined and not necessarily unique name of the element

Member Function Documentation

compute_constants()

void impactx::elements::Buncher::compute_constants ( RefPart const & refpart )

inline

Compute and cache the constants for the push.

In particular, used to pre-compute and cache variables that are independent of the individually tracked particle.

Parameters

refpart

reference particle

operator()()

template<typename T_Real = amrex::ParticleReal, typename T_IdCpu = uint64_t>

AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE void impactx::elements::Buncher::operator() ( T_Real const &AMREX_RESTRICT x, T_Real const &AMREX_RESTRICT y, T_Real const &AMREX_RESTRICT t, T_Real &AMREX_RESTRICT px, T_Real &AMREX_RESTRICT py, T_Real &AMREX_RESTRICT pt, T_IdCpu const &AMREX_RESTRICT idcpu, RefPart const &AMREX_RESTRICT refpart ) const

inline

This is a buncher functor, so that a variable of this type can be used like a buncher function.

The

See also

compute_constants method must be called before pushing particles through this operator.

Parameters

x	particle position in x
y	particle position in y
t	particle position in t
px	particle momentum in x
py	particle momentum in y
pt	particle momentum in t
idcpu	particle global index (unused)
refpart	reference particle (unused)

reverse()

void impactx::elements::Buncher::reverse ( )

inline

Reverse the element (negate V)

transport_map()

AMREX_GPU_HOST AMREX_FORCE_INLINE Map6x6 impactx::elements::Buncher::transport_map ( RefPart const &AMREX_RESTRICT refpart ) const

inline

This function returns the linear transport map.

Parameters

[in]

refpart

reference particle

Returns

6x6 transport matrix

Member Data Documentation

m_k

amrex::ParticleReal impactx::elements::Buncher::m_k

normalized (max) RF voltage drop.

m_kV_r2bg2

amrex::ParticleReal impactx::elements::Buncher::m_kV_r2bg2

private

-m_k*m_V

m_neg_kV

amrex::ParticleReal impactx::elements::Buncher::m_neg_kV

private

RF wavenumber in 1/m.

m_V

amrex::ParticleReal impactx::elements::Buncher::m_V

type

auto impactx::elements::Buncher::type = "Buncher"

staticconstexpr

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The documentation for this struct was generated from the following file:

• /home/docs/checkouts/readthedocs.org/user_builds/impactx/checkouts/latest/src/elements/Buncher.H