PHY106Particle Accelerators & Detectors

PHY106Particle Accelerators & Detectors -...

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Unformatted text preview: Announcements Friday is entirely devoted to Q&A. Come armed with questions ! Exam Monday: ~23-25 questions, short answer, or fill in the blank. I will let you drop any 4. You must choose which ones to drop. Pick up question sheet and answer the questions…these things are what I want you to know for the exam. HW solutions for today’s HW will be posted in the library tomorrow morning. You must turn in your HW by then to receive any credit. Particle Accelerators & Detectors Fermilab A Detector at Fermilab Accelerating Charges e 0 V +1000 V +2000 V +3000 V e e e After this, the electron has an energy of … 3000 [eV]. So, to get to 5 MeV, for example, we would need 5 million volts !!! This is highly impractical ! So what do we do? Linear Accelerator-1000 V +1000 V-1000 V +1000 V e e-1000 V +1000 V-1000 V +1000 V e-1000 V +1000 V-1000 V +1000 V e-1000 V +1000 V-1000 V +1000 V The voltage is “switched” back & forth at just the right time so that the electron is always accelerated toward the next plate ! Note, we only need 1000 V or so, not 1 million volts. If it passes through 1000 of these plates, it will have gained 1000 times the energy of a single pair ! In this way, we can accelerate an electron to high energy. Linear Accelerator e e Vroomm!...
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PHY106Particle Accelerators & Detectors -...

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