Compensation of beam-beam effects in the Tevatron collider with electron beams

Shiltsev, V.; Finley, D. A.; Sery, A.; Danilov, V.

doi:10.1109/pac.1999.792426

Cited by 12 publications

(14 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…

AbstractRecently, it was proposed to use negatively charged electron beams for compensation of beambeam effects due to protons in the Tevatron collider [1]. We show that a similar compensation is possible in space-charge dominated low energy proton beams.

…”

mentioning

confidence: 74%

“…Negatively charged electron beams can be used for compensation of space-charge effects in low energy proton beams the same way as in the ongoing Tevatron Electron Lens (TEL) project to compensate beam-beam effects due to protons in the Tevatron collider [1]. Protons going through the electron beam experience focusing force which has opposite sign to self space charge force and can precisely compensate the latter if:…”

Section: Compensation Of Space Charge Forces In Proton Machines With mentioning

confidence: 99%

“…The condition #3 of the compensation can be rewritten is the form of equality of the betatron tune shifts due to electron beam [1] and the proton space charge tune shift Eq. (1):…”

Section: Compensation Of Space Charge Forces In Proton Machines With mentioning

confidence: 99%

“…Indeed, a characteristic modulation length which can be provided by an electron pulse interacting with protons along distance L and moving in opposite directions (i.e., beams collide) is about σ L(β p + β e )/β e (see Fig.8 in Ref. [1] for explanations). Therefore, even for β e β p one gets L ≤ σ/2.…”

Section: Compensation Of Space Charge Forces In Proton Machines With mentioning

confidence: 99%

See 3 more Smart Citations

Space-charge compensation in high-intensity proton rings

Burov¹,

Foster²,

Shiltsev³

2000

View full text Add to dashboard Cite

Recently, it was proposed to use negatively charged electron beams for compensation of beambeam effects due to protons in the Tevatron collider [1]. We show that a similar compensation is possible in space-charge dominated low energy proton beams. The idea has a potential of severalfold increase of the FNAL Booster beam brightness. Best results will be obtained using three electron lenses around the machine circumference, using co-moving electron beam with time structure and profile approximately matched to the proton beam. This technique, if feasible, will be more cost effective than the straightforward alternative of increasing the energy of the injection linac.

show abstract

“…

…”

mentioning

confidence: 74%

Section: Compensation Of Space Charge Forces In Proton Machines With mentioning

confidence: 99%

“…The condition #3 of the compensation can be rewritten is the form of equality of the betatron tune shifts due to electron beam [1] and the proton space charge tune shift Eq. (1):…”

Section: Compensation Of Space Charge Forces In Proton Machines With mentioning

confidence: 99%

Section: Compensation Of Space Charge Forces In Proton Machines With mentioning

confidence: 99%

See 2 more Smart Citations

Space-charge compensation in high-intensity proton rings

Burov¹,

Foster²,

Shiltsev³

2000

View full text Add to dashboard Cite

show abstract

“…However, an alternative approach is under study that relies on a low energy electron beam, current modulated at the bunch crossing frequency (7.5 MHz) in order to provide an additional focusing force that cancels the lowest order (tune va.riation) effect within the antiproton beam [8]. A system consisting of a 6.7 KV, 3 A electron beam has been constructed and tests are: now underway to demonstrate the ability to program cuxTent pulses at 7.…”

Section: Electron Beam Compensationmentioning

confidence: 99%

Tevatron performance goals for the coming decade

Holmes

1999

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

View full text Add to dashboard Cite

Impedance and Collective Effects

Métral

Rumolo

Herr

2020

Particle Physics Reference Library

View full text Add to dashboard Cite

As the beam intensity increases, the beam can no longer be considered as a collection of non-interacting single particles: in addition to the "single-particle phenomena", "collective effects" become significant. At low intensity a beam of charged particles moves around an accelerator under the Lorentz force produced by the "external" electromagnetic fields (from the guiding and focusing magnets, RF cavities, etc.). However, the charged particles also interact with themselves (leading to space charge effects) and with their environment, inducing charges and currents in the surrounding structures, which create electromagnetic fields called wake fields. In the ultra-relativistic limit, causality dictates that there can be no electromagnetic field in front of the beam, which explains the term "wake". It is often useful to examine the frequency content of the wake field (a time domain quantity) by performing a Fourier transformation on it. This leads to the concept of impedance (a frequency domain quantity), which is a complex function of frequency. The charged particles can also interact with other charged particles present in the accelerator (leading to two-stream effects, and in particular to electron cloud effects in positron/hadron machines) and with the counter-rotating beam in a collider (leading to beam-beam effects). As the beam intensity increases, all these "perturbations" should be properly quantified and the motion of the charged particles will eventually still be governed by the Lorentz force but using the total electromagnetic fields, which are the sum of the external and perturbation fields. Note that in some cases a perturbative treatment is not sufficient and the problem has to be solved self consistently. These perturbations can lead to both incoherent (i.e. of Coordinated by E. Metral

show abstract

Compensation of beam-beam effects in the Tevatron collider with electron beams

Cited by 12 publications

References 2 publications

Space-charge compensation in high-intensity proton rings

Space-charge compensation in high-intensity proton rings

Tevatron performance goals for the coming decade

Impedance and Collective Effects

Contact Info

Product

Resources

About