Electron Gun: Difference between revisions

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** [https://en.wikipedia.org/wiki/Cerium_hexaboride Cerium Hexaboride](CeB6)
** [https://en.wikipedia.org/wiki/Cerium_hexaboride Cerium Hexaboride](CeB6)
*Phoshors
*Phoshors
** Zinc sulfide [https://en.wikipedia.org/wiki/Zinc_sulfide](ZnS) (Copper/Silver Activated)
** [https://en.wikipedia.org/wiki/Zinc_sulfide Zinc sulfide](ZnS) (Copper/Silver Activated)


==Setup==
==Setup==

Revision as of 14:51, 29 January 2022

Creating an SEM was proven to be too difficult. The electron gun with a magnetic lens is a simplification of the project.

Idea

There are two parts to this project. The first would be to create the electron source which seems to be done with the use of a Lenard/Crookes tube [1]. Secondly, we would want to focus this electron beam into a spot with the use of a homemade magnetic lens (probably a solenoid of some form). We could perhaps perform a measurement of the focal length with respect to the magnetic field strength of the lens.

Team Members

Irvin Lim
Aliki Sofia Rotelli
Tan Chuan Jie
Lai Tian Hao

Equipments & Components

High Vacuum (HV) Components

  • Roughing Pump
  • Turbo Pump
  • KF-25 Stainless Steel vacuum bellow (1 meter)
  • CF-40 Stainless Steel Tee
  • CF-40 Stainless Steel Cross
  • CF-40 Stainless Steel Viewport
  • CF-40 Stainless Steel High-voltage Dual Port Feedthroughs (x2)
  • CF-40 Stainless Steel Multi-Pin Feedthrough, Double-Ended
  • CF-40 to KF-25 Stainless Steel Flange Adapter

Electrical Components

  • High Voltage Power Supply Unit (PSU) (up to 5kV)
  • Current Controlled PSU

Beam Focusing Components

  • Enzil Lens
  • Pair parallel plates (x2)

Measurement Components

  • RBD's 9103 USB Picoammeter, (Alternative: Multimeter)
  • High Vacuum Digital Gauge, with range ~ mbars
  • Thermocouple

Other Components

Setup

Measurements

Potential Problems