ALPhA (Advanced Laboratory Physics Association) has worked out a deal with Excelitas to sell Single-Photon Counting Modules (SPCMs) to instructional labs. The detectors carry labels specifying that these units belong in the undergraduate instructional labs and not in research labs. These educational detectors have reduced specs, notably a higher background dark count rate, compared to other
In 2006, then-students Oliver Jan and Phil Makotyn from University of Illinois (at Professor Paul Kwiat’s lab) developed an actively-quenched Single-Photon Counting Module (SPCM) based on the Perkin-Elmer C30902S-DTC Single-Photon Avalanche Photodiode (SPAD).
The book’s Figure 65 shows our β-particle magnetic deflection setup. It consists of a 90Sr disc source of beta particles, two copper washers to collimate the beam, and GM tubes placed at 0º and 90º to the β-particle beam. A sufficiently strong magnetic field (around 800 Gauss = 0.08 Tesla) provided by a permanent magnet bends the beam
The attenuation of radiation as a function of distance can be measured using a radiation counter with a Geiger-Müller tube that is sensitive to α, β, and γ radiation. We used exempt plastic-disc sources containing Polonium 210 (210Po), Strontium 90 (90Sr), and Cobalt 60 (60Co) to experiment with the penetrating power of α, β,
These two images supplement the book’s Figure 81. They were taken with the spectrometer of Figure 80.
A very funny cartoon by Prof. Dr. Claus Grupen of Siegen University:
diy Measurement of the Charge-to-Mass Ratio of the Electron Using “Magic Eye” Tube – Supplementary Pictures
Figure 54 in the book shows our setup based on a 6AF6-G “magic eye” tuning tube to measure e/m. The pictures in this figure supplement the book’s Figure 54 to help you build your own system. In the 6AF6, electrons produced by a thermionic cathode cause fluorescence on the tube’s anode. Applying an external magnetic field curves
This is an inside view of the two-channel photon and coincidence counter of the book‘s Figure 145. It is used in the photon entanglement experiments of Chapter 8.
Figures 51 and 52 in the book show how to use an oscilloscope 2AP1 CRT to measure e/m using Hoag’s method. The pictures in this figure supplement the book’s, showing you how to construct the d.i.y. setup, as well as the way in which the electron beam fan is reduced to a point as the magnetic
This is a supplementary picture to the book’s Figure 43. It shows our d.i.y. “Maltese Cross” CRT connected to the vacuum system and high-voltage power supply. Please note that the HV power supply is configured to produce a negative output referenced to ground. The anode and target electrode are at ground potential. The cathode rod
This figure supplements the book’s Figure 42. The book’s figure describes the features that appear in the glow discharge. However, we felt that a color picture is required as a cross-check to help you correctly set up your own system.
This is an inside view of our X-Band Gunnplexer transceiver (book‘s Figure 12) that should help you build your own units if you follow the schematics shown in the book’s Figure 11 . It is used throughout Chapter 1 for experiments in microwave optics, in Chapter 6 to measure single-slit diffraction, and in Chapter 7 to experiment
This is the surplus Gen III image intensifier tube (an MX-10160 Gen III intensifier tube used in the helmet-mounted AN/AVS-6 “ANVIS” aviation night vision imaging system, which we purchased on eBay®) that we used to build our setup to image interference patterns from our single-photon two-slit setup (book‘s Figure 93). The tube is supplied by
We modified a surplus Civil Defense V-700 radiation survey meter made by Electro Neutronics Inc. (Model 6-b) into a very capable radiation counter capable of working with both Geiger-Müller and PMT scintillation probes. We modified the front panel to accommodate the new switches, connectors, and panel light. In addition, we placed a Veeder-Root count totalizer