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tech / sci.math / Re: Electrons with infinite energy, giving up photons while being accelerated?

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o Re: Electrons with infinite energy, giving up photons while beingDeandre Theofilopoulos

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Re: Electrons with infinite energy, giving up photons while being accelerated?

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https://www.novabbs.com/tech/article-flat.php?id=133796&group=sci.math#133796

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Path: i2pn2.org!i2pn.org!eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: dol...@oooerreo.he (Deandre Theofilopoulos)
Newsgroups: sci.physics.relativity,sci.physics,sci.math
Subject: Re: Electrons with infinite energy, giving up photons while being
accelerated?
Date: Sat, 6 May 2023 12:19:34 -0000 (UTC)
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 by: Deandre Theofilopoul - Sat, 6 May 2023 12:19 UTC

Tom Roberts wrote:

> On 5/5/23 1:37 PM, Paul B. Andersen wrote:
>> LHC: Max energy in each proton: 6.8 TeV Max speed of each proton:
>> 0.999999990c = (1-9.5e-9)c Circumference: 26.66 km
>> Tevatron: Max energy in each proton: 1.0 TeV Max speed of each proton:
>> 0.999999560c = (1-4.4e-7)c Circumference: 6.28 km
>> Why do you think the RF-cavities in the LHC are able to accelerate the
>> protons to higher kinetic energy and speed than the RF-cavities in the
>> Tevatron?
> This has nothing to do with "energy transfer efficiency", whatever that
> is supposed to mean.
>
> These machines have different operating energies because the operators
> configure the machines that way. The magnets in these machines impose an
> upper limit the momentum of the protons (and antiprotons for the
> Tevatron), and those limits are different for the two machines. The
> operators do not permit the RF cavities to accelerate the beams to
> higher momentum than the magnets' ability to keep them in the beam
> pipe(s). The operating momentum (and energy) is determined by the
> bending magnets and the radius of the beam pipes in them, not the RF
> cavities. The LHC has stronger bending magnets and a larger radius, so
> it can transport higher-energy proton beams.
>
> (Once the operating energy is reached, they do need to keep
> the RF cavities energized for longitudinal stability, but the RF
> phase is adjusted so it no longer accelerates the beam.)

this is a *_common_error_*. Many out there confusing the
*_inductive_coupling_* with _RF_. For instance the ISO14443 (proximity
ICC) are doing it at 13.56MHz, called also *_RFID_*, but has nothing to do
with _RF_.

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