Blog

2024

Radial profiles of deposition in a cylinder
November 2
Interpolating in log-log space is often nice
September 28
Radial profiles of deposition in a disk: a tricky Taylor series
July 20
Fraction of particles passing through a disk
July 18
Particles from a Maxwellian distribution in a slab with a time-based decay probability
April 21
Interaction of particles at depth in a slab
April 14

2023

Finding the fusion rate coefficient for a beam of fast particles in a Maxwellian background
March 22

2022

Research article: the value of fusion energy to a decarbonized US electric grid
October 6
Particles leaving a finite cylinder through the ends
May 30

2021

General-audience article published in Bulletin of the Atomic Scientists
November 18
Fusion reactors are a bit like molten salt power towers
November 14
Optimizing Kerbal life support with linear fractional programming
September 12
Sauter shape studies, Part 2: poloidal circumference and surface area
May 31
Sauter shape studies, Part 1: Overview, volume, and cross-sectional area
April 10
An ellipse's parallel curve: length, area, and torus volume.
April 6
The Princeton Dee magnet
February 28
Polar form for an ellipse offset from the origin
February 16
Scaling of relative neutron fluxes at inboard and outboard midplane with aspect ratio
February 6

2020

Magnetic field at the surface of a long conductor with a square cross section
October 21
OpenRCT2 operations research: how many mechanics should I hire?
August 31

2019

The wrong (and right) way to select random velocities of particles moving through a surface
April 28

2018

Chance of particles passing through a cylinder without interacting
November 15
Particles passing through an infinite cylinder
September 30
Average distance a particle starting inside an infinite tube travels through the wall of the tube.
March 24

2016

Delta V required for low-TWR take off to orbit around a spherical airless world
August 13
Probability of a radioactive particle decaying after passing through a surface
January 15