Discussion Overview
The discussion revolves around the feasibility of using a bell jar for building a Farnsworth-Hirsch-Fusor, specifically addressing the pressure requirements needed for operation, which range from 0.1 to 10 Pa. Participants explore the capabilities of bell jars in maintaining vacuum levels and the necessary equipment for the project.
Discussion Character
- Exploratory
- Technical explanation
- Homework-related
Main Points Raised
- One participant expresses uncertainty about whether an ordinary bell jar can maintain a vacuum at the required pressure levels of 0.1-10 Pa.
- Another participant suggests that while some bell jars may reach pressures around 10-100 Pa, achieving below 1 Pa may depend on factors such as the seal quality and the vacuum pump used.
- It is proposed that replacing the gasket with a new material like viton or silicone and ensuring cleanliness could improve the vacuum performance of the bell jar.
- A participant mentions having access to a vacuum pump that can reach down to 4 x 10^-4 mbar, which is relevant for the project.
- There is a suggestion to test the bell jar's vacuum capability and a query about the availability of a pressure gauge to measure the vacuum level.
- One participant notes the need for additional materials, specifically Deuterium and two spherical electrodes, for the project.
Areas of Agreement / Disagreement
Participants generally agree that a bell jar may not be suitable for achieving very low pressures without modifications, but there is no consensus on the exact capabilities of the bell jar in question or the specific pressure it can maintain.
Contextual Notes
Limitations include uncertainty regarding the specific pressure limits of the bell jar, the potential impact of outgassing, and the need for a pressure gauge to accurately measure vacuum levels.
Who May Find This Useful
Individuals interested in vacuum technology, high school students working on physics projects, and hobbyists exploring fusion-related experiments may find this discussion relevant.