MOA4I3
LNF-INFN, Frascati, Italy
INFN-Roma1, Rome, Italy
La Sapienza University of Rome, Rome, Italy
CERN, Meyrin, Switzerland
INFN-Roma1, Rome, Italy
CERN, Meyrin, Switzerland
LNF-INFN, Frascati, Italy
| Paper | Title | Page |
|---|---|---|
MOA4I3 |
Collective Effects in Lepton Circular Colliders and Synchrotron Light Sources | |
|
||
| In this seminar we discuss differences and similarities in beam dynamics of high current and high brightness beams in lepton and hadron circular accelerators. A particular attention is given to an interplay of different collective phenomena affecting the lepton machine performance. | ||
|
|
Slides MOA4I3 [2.914 MB] | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| TUA2C2 | Recent Advances in the CERN PS Impedance Model and Instability Simulations | 86 |
|
||
| Transverse instability growth rates in the CERN Proton Synchrotron are studied thanks to the recently updated impedance model of the machine. Using this model, macroparticle tracking simulations were performed with a new method well-suited for the slicing of short wakes, which achieves comparable performance to the originally implemented method while reducing the required number of slices by a factor of 5 to 10. Dedicated beam-based measurement campaigns were carried out to benchmark the impedance model. Until now, the model underestimated instability growth rates at injection energy. Thanks to a recent addition to the impedance model, namely the kicker magnets¿ connecting cables and their external circuits, the simulated instability growth rates are now comparable to the measured ones. | ||
|
|
Slides TUA2C2 [0.736 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-TUA2C2 | |
| About • | Received ※ 28 September 2023 — Revised ※ 07 October 2023 — Accepted ※ 09 October 2023 — Issued ※ 21 October 2023 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| THAFP05 | A Wireless Method for Beam Coupling Impedance Measurements of the LHC Goniometer | 407 |
|
||
| The beam coupling impedance (BCI) of an accelerator component should be ideally evaluated exciting the device with the beam itself. However, this scenario is not always attainable and alternative methods must be exploited, such as the bench measurements techniques. The stretched Wire Method (WM) is a well established technique for BCI evaluations, although nowadays its limitations are well known. In particular, the stretched wire perturbs the electromagnetic boundary conditions. Therefore, the results obtained could be inaccurate, especially below the cut-off frequency of the beam pipe in the case of cavity-like structures. To overcome these limitations, efforts are being made to investigate alternative bench measurement techniques that will not require the modification of the device under test (DUT). In this framework, a wireless method has been identified and tested for a pillbox cavity. Its potential for more complex structures, such as the LHC crystal goniometer is explored. | ||
|
|
Slides THAFP05 [1.088 MB] | |
|
|
Poster THAFP05 [1.151 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-THAFP05 | |
| About • | Received ※ 29 September 2023 — Revised ※ 05 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 11 October 2023 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |