What types of basic physics research can be done with cathode ray tubes?

I was interested in trying to do some basic physics research with cathode ray tubes. I was wondering what the options might be with this kind of simple and inexpensive electronic technology. A cathode ray tube is really a simple kind of particle accelerator, isn't it? And, Philo Farnsworth actually built his "Farnsworth fuser" with cathode ray tubes, didn't he? So, some work on elementary nuclear fusion reactors might be a possibility? How about creating and modifying isotopes of some types, would that be a possibility, as well? Other possibilities? Comment response: CRTs used to be really easy to find since they were the primary way to display data electronically. Some ideas, in rough order of easy to hard: •Demonstrate high voltage, by unhooking the high voltage drain wire and arcing it to the chassis. (In college I used to use my computer monitor this way, to light candles, incense, and other peoples' smokes) •Demonstrate electrostatic or magnetic steering of electrons, by bringing charged plates or magnets near the tube and watching the spot deflect. •Demonstrate X-ray formation by upping the high voltage and exposing photographic plates with the X-rays emitted by the front of the CRT. ------ Things below here involve disassembling a CRT and placing the parts in a separate vacuum chamber, which is a lot harder than messing with a completed CRT. •Use the electron beam to etch materials •Add a longitudinal focusing coil and create a scanning electron microscope •Build a small cyclotron and use the electron gun to feed it. •Demonstrate that you can create antimatter with your cyclotron, by placing a gamma ray spectrometer nearby and detecting the 0.511 MeV positron-annihilation line. •Modify your CRT to accelerate protons instead, by providing a hydrogen arc source near the accelerator assembly and inverting the sign of the voltage supply •Interfere beams from two proton-modified CRTs and demonstrate hydrogen fusion using a gamma ray spectrometer.