test chapter 7

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Author:
MYKE
ID:
240258
Filename:
test chapter 7
Updated:
2013-10-13 22:15:22
Tags:
monday
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kats
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  1. Electrons traveling from cathode to anode constitute the _____ and are sometimes called _______
    • x-ray tube current
    • projectile electrons
  2. Approximately ___% of the kinetic energy of projectile electrons is converted to heat
    99
  3. Only approximately ____% of projectile electron kinetic energy is used for the production of x-radiation
    1
  4. If the projectile electron interacts with an inner-shell electron of the target atom rather than with an outer-shell electron,____  can be produced
    characteristic x-rays
  5. ______ x-rays result when the interaction is sufficiently violent to ionize the target atom through total removal of an inner-shell electron.
    Characteristic
  6. ________ x-rays result from the interaction between a projectile electron and a target nucleus. The electron is slowed, and its direction is changed
    Bremsstrahlung
  7. The total number of x-rays emitted from an x-ray tube could be determined by adding together the number of x-rays emitted at each energy over the entire spectrum, a process called _______
    integration
  8. what is G
    G-  stater
  9. what is B
    B- Envelope
  10. what is A
    A- Rotor
  11. what is c
    C- Focusing cup
  12. What is D
    D-Filamate
  13. wht is E
    E-  Target
  14. what is F
    F- Anode Stem
  15. When the rotor, or prep button, is activated what 5 things happens On the Cathode Side of the X-ray Tube
    1. Filament current heats up the filament.

    • 2. This heat boils electrons off the filament (thermionic emission).
    • 3. These electrons gather in a cloud around the filament (space charge).
    • 4. The negatively charged focusing cup keeps the electron cloud focused together.

    5. The number of electrons in the space charge is limited (space charge effect).
  16. When the rotor, or prep button, is activated what 5 things happens On the Anode Side of the X-ray Tube
    The rotating target begins to turn rapidly, quickly reaching top speed.
  17. After activation of the rotor and the exposure is initiated what 2 things happen On the Cathode Side of the X-ray Tube
    • 1. High negative charge strongly repels electrons.
    • 2. These electrons stream away from the cathode and toward the anode (tube current).
  18. After activation of the rotor and the exposure is initiated what 3 things happen On the Anode Side of the X-ray Tube
    • 1. High positive charge strongly attracts electrons in the tube current.
    • 2. These electrons strike the anode.
    • 3. X-rays and heat are produced.

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