Zusammenfassung Reaktorphysik
This is a (German) summary of basic nuclear reactor physics that has been written by me during learning for the exam of an university course.
WKB-Näherung
This is a short (German) summary of the WKB approximation applied to the time invariant Schrödinger equation, which is a method used for finding approximate solutions to linear differential equations with spatially varying coefficients.
Fast ballpark calculation of maximum speed for maximum car througput (using simple high-school physics and math)
The fast and short answer to the question which speed would be (under optimal conditions) the speed to choose for maximum car throughput on a single lane. Contrary to the often believed fact it's shown that higher speed does not correlate with higher throughput by using simple high-school math.
Where does complex impedance come from?
This post describes a simple derivation of the complex inpedance formulas well known from electronics.
Capacitance measurement with AVR (simple, fast)
Mini article about the measurement of capacitance with AVRs with a minimum of external components (in it's most extreme form none external components exploiting the gate capacitance of the micro-controllers input)
Z, ABCD, S and T parameters in two port networks
A short summary about the different meaning and interpretation of impedance, ABCD, scattering and transfer parameters in simple (linear) two port networks.
Some Gaussian integrals in 1 dimension
Short summary of various commonly used Gaussian integrals (1 dimensional) most of the time not shown in school textbooks.
Maxwell equation summary
A short summary about the basic properties of Maxwell equations, the resulting electromagnetic wave equations and commonly used gauges (Lorenz, Coulomb).
3D printed parts using PLA and standard FDM process in vacuum?
Just a short description of what I've tried (and didn't expect to work) about the usage of 3D printed parts made out of PLA in the typical desktop FDM 3D printing process, i.e. a method to build really low cost parts at home.
Cutting glass vacuum tubes using hot wire
Something easy and simple. How to cut glass tubes and other glass parts using electrically heated hot wire.
Basic behaviour of thermionic emission cathodes
A short summary about the operation and characteristics of thermionic emission cathodes, the current limiting factors and the most important failure modes
Building a simple improvised electron gun from common of the shelf components
Mini blog article that summarizes the build of a simple 2 mA beam current electron gun from common of the shelf components gathered from the hardware store as well as some 3D printed components.
Summary: Pierce type electron gun essentials and most basic geometry
A short summary about the basic conditions in a pierce type electron gun
Matching impedance using NanoVNA v2, NanoVNASaver and SimSmith
A mini summary on how to perform impedance matching for antennas or other devices using the NanoVNA v2 together with the NanoVNASaver and SimSmith applications based on the impedance matching of an electron deflection system
Composition of atmospheric air and mean thermal speed
Table containing the typical atmospheric air components as well as their mean thermal speed and mean molecular mass.
Ethernet control of Gamma vacuum quad ion pump controller
Notes on the the protocol that's required to remotely control Gamma vacuum ion pumps / titan sublimation pumps via a quad pump controller and some views on the inner workings of my own library implementing the protocol
A vacuum oil well - using water to check for oily contamination in a vacuum chamber
This blog post describes a really simple method to get a hint if the interior of a vacuum chamber has been contaminated with some oil without the use of expensive chemical analysis.
