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A2 Physics PH5 B-fields
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How does a Linear accelerator work?
1.Proton is accelerated to right towards -ve tube.
2. When proton inside tube, direction of pd changes (no force acting on it in tube).
3. When proton is in next gap second tube is negative.
4. Electric field accelerates it again
How does the proton maintain always being accelerated in the Linear accelerator
1. p.d synchronised, proton must be in tube to when pd changes direction.
2. Frequency remains constant
3. Increas the lengths of tube and gaps between them because proton is travelling a greater distance every time.
How does a cyclotron work?
1. Proton is accelerated across gap between 2 dees by an
electric field.
2. The magnetic field maintains circular motion
3. Speed of proton increases so radius of circle increases.
4. Proton spirals out and leaves cycloton.
Is the frequency changing in a cyclotron?
No, frequency is a constant. Equate circular acceleration and force on a charged particle, get frequency and see the constants.
How does a synchrotron work?
1. Speed increase due to changing electric field.
2. Charged particles performing circular motion due to B-field.
3. Acceleration occur 4 times per orbit.
How does synchrotron maintain constant radius?
1. B-field increases in strength as particles move quicker.
2. Frequency of ac supply increases.
Author
keesukim
ID
272021
Card Set
A2 Physics PH5 B-fields
Description
Questions on B-fields
Updated
4/26/2014, 10:06:45 PM
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