Data structure

Table of Contents

• Marker storage
  • pic1 array
  • pic2 array
  • Workspace arrays

Description of the particle data structures.

Author

E. Lanti

Date

06.2017

Marker storage

pic1 array

This array is used to store the marker properties that change with time. The number of attributes is set by MAX_WORK_NC=5 and MAX_WORK_C=7 when the 2-weights scheme is selected.

Position	Parameter name	Description
1	R_PIC	Radial position of the marker
1	S_PIC	Radial postition of the marker
2	Z_PIC	Poloidal position of the marker
2	CHI_PIC	Poloidal position of the marker
3	PHI_PIC	Toroidal position of the marker
4	U_PIC	Parallel velocity of the marker
5	W_PIC	\(\delta f\) weights of the marker
6	P_PIC	\(f_0\) weights of the marker
7	W3_PIC	\(w_3\) weights of the marker

pic2 array

This array is used to store the constant marker properties. The number of attributes is set by MAX_PIC2_NC=12 and MAX_PIC2_C=15 when the 2-weights scheme is selected.

Position	Parameter name	Description
1	MU_PIC	Magnetic moments of the marker
2	PVOL_PIC	Initial pvol ???
3	ALP_PIC	Tilt-angle for the averaging
3	COSALP_PIC	Cosine of the tilt-angle for the averaging
4	FFINIT_PIC	Initial full-f
5	ST0_PIC	\(s\) at \(t_0\) for optimized loading
6	ALPT0_PIC	Pitch angle at \(t_0\) for optimized loading
7	VPT0_PIC	Perpendicular velocity at \(t_0\) for optimized loading
8	PSI0CORR_PIC	Correction of the canonical Maxwellian
9	KSIETA_PIC
10	TEST_PIC
11	LABEL_PIC
12	TRAP_PIC
13	DVPAR_PIC	Momentum variation due to kick and transform ???
14	DV2_PIC	Energy variation due to kick and transform ???
15	DN_PIC	Energy variation due to kick and transform ???

Workspace arrays

Both work1 and work2 are working arrays used to store temporary information for RK. They contain a `‘time derivative’' of pic1. The number of attributes is set by MAX_WORK_NC=5 and MAX_WORK_C=7 when the 2-weights scheme is selected.

Position	Parameter name	Description
1	DOTR_PIC	Increment of marker's radial position in one timestep
1	DOTS_PIC	Increment of marker's radial position in one timestep
2	DOTZ_PIC	Increment of marker's poloidal position in one timestep
2	DOTCHI_PIC	Increment of marker's poloidal position in one timestep
3	DOTPHI_PIC	Increment of marker's toroidal position in one timestep
4	DOTU_PIC	Increment of marker's parallel velocity in one timestep
5	DOTW_PIC	Increment of marker's weight in one timestep
6	DOTP_PIC	Increment of marker's \(f_0\) weight in one timestep
7	DOTW3_PIC	Increment of marker's \(w_3\) weight in one timestep