Struct BeamSpread 

pub struct BeamSpread {
    pub landing_m: [f64; 2],
    pub profile: BeamProfile,
    pub divergence: Divergence,
}

Where a run’s primaries land and how they diverge: a finite lateral profile about a landing point on the front face, and an angular spread about the nominal Primary::direction. The default is a point beam without divergence, which draws no random numbers, so a run with it is bit-identical to one made before this type existed.

Per history the position is sampled first, then the direction, both from that history’s own stream, so a run is identical at any thread count. The divergence is the ion beam’s (Divergence: Gaussian per-plane angles, or uniform in solid angle within a cone). Where the nominal direction points into the target (x > 0), deflections that would send the primary out of it are rejected and redrawn (the inward conditioning of the ion side), so the draw count is then variable but still a function of the history’s stream alone.

Fields

landing_m: [f64; 2]

Landing point (y, z) on the front face, m.

profile: BeamProfile

Lateral profile about the landing point.

divergence: Divergence

Angular spread about the nominal direction.

Implementations

impl BeamSpread

pub fn is_point(&self) -> bool

Whether this is the default point beam (it is then left out of the run metadata).

pub fn validate(&self) -> Result<(), TransportError>

Check the parameters.

pub fn sample_position<R: Rng + ?Sized>(&self, rng: &mut R) -> [f64; 2]

Draw the start (y, z), m: the landing point plus a profile offset.

Trait Implementations

impl Clone for BeamSpread

fn clone(&self) -> BeamSpread

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for BeamSpread

impl Debug for BeamSpread

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BeamSpread

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for BeamSpread

fn eq(&self, other: &BeamSpread) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for BeamSpread

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for BeamSpread