| Paper | Title | Page |
|---|---|---|
MOWAUD04 |
High Luminosity Electron-Proton (Ion) Colliders | |
|
||
| At Budker INP, we consider now possibility to reach interesting enough cooling times for 100 GeV range proton (ion) beams, using single pass electron beam with parameters, which are now in operation for Novosibirsk free electron lasers. To reach good electron cooling for high energy protons, it is necessary to get effective electron beam angular spread smaller than angular spread in proton beam. This requires to immerse electron beam in co-linear longitudinal magnetic field. It is assumed ' "large" proton amplitudes would be cooled with stochastic cooling, but the small amplitudes core would be cooled with appropriate electron beam, produced similar way as for our FEL. For higher charge ions to reach acceptable cooling rate is even easier. | ||
|
Slides MOWAUD04 [8.671 MB] | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
MOXAUD01 |
Performance of the 2 MeV Electron Cooler at COSY | |
|
||
| The 2 MeV electron cooler is operated in the COSY ring since 2013. So far electron beam energy up to 1.5 MeV was demonstrated. Dedicated electron cooling studies with proton beams up to 1.66 GeV kinetic energy and electron beam current up to 0.9 A were carried out. A reduction of proton beam emittance by one order of magnitude within a few hundred seconds was observed. Overview of HV and electron beam commissioning activities is presented. Electron cooling results are discussed. | ||
|
|
Slides MOXAUD01 [4.097 MB] | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| MOXAUD02 | Experimental Observation of Longitudinal Electron Cooling of DC and Bunched Proton Beam at 2425 MeV/c at COSY | 10 |
|
||
| The 2 MeV electron cooling system for COSY-Julich started operation in 2013 years. The cooling process was observed in the wide energy range of the electron beam from 100 keV to 908 keV. Vertical, horizontal and longitudinal cooling was tested at bunched and continuous beams. The cooler was operated with electron current up to 0.9 A. This report deals with the description of the experimental observation of longitudinal electron cooling of DC and bunched proton beam at 2425 MeV/c at COSY. | ||
|
|
Slides MOXAUD02 [10.860 MB] | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| MOPF02 | The Green Energy Turbine as Turbo Generator for Powering the HV-Solenoids at a Relativistic Electron Cooler | 29 |
|
||
| One challenge in the development of a relativistic electron cooler is the powering of components, e.g. HV-solenoids, which sit on different potentials within a high voltage vessel and need a floating power supply. Within a design study, BINP SB RAS Novosibirsk has proposed two possibilities to build a power supply in a modular way. The first proposal is to use two cascade transformers per module. One cascade transformer powers 22 small HV-solenoids; the second one should generate the acceleration/deceleration voltage. The cascade transformers are fed by a turbo generator, which is powered by a gas under high pressure which is generated outside of the vessel. The second possibility is to use two big HV-solenoids per module. In this proposal, the HV-solenoids are powered directly by a turbo generator. For both concepts, a suitable turbo generator is essential. A potential candidate for the turbo generator could be the Green Energy Turbine (GET) from the company DEPRAG, which works with dry air and delivers a power of 5 kW. At the Helmholtz-Institut Mainz two GETS are tested. After an introduction, we present our experience with the GET and give an overview of the further road map. | ||
|
Poster MOPF02 [3.424 MB] | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| TUPF08 | High Efficiency Electron Collector for the High Voltage Electron Cooling System of COSY | 112 |
|
||
| A high efficiency electron collector for the COSY high voltage electron cooling system was developed. The main feature of the collector is usage of special insertion (Wien filter) before the main collector, which deflects secondary electron flux to special secondary collector, preventing them fly to the electrostatic tube. In first tests of the collector in COSY cooler efficiency of recuperation better then 10-5 was reached. Before assembling of the cooler in Jülich upgrades of the collector and electron gun were made. After the upgrade efficiency better then 10-6 was reached. Design and testing results of the collector are described. | ||
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
TUPF11 |
Progress in Experimental Demonstration of Cooling of Ions by a Bunched Electron Beam | |
|
||
| Electron cooling is essential for achieving high luminosities for hadron colliders by enabling a reduction of emittance of hadron beams in storage rings. For several future projects such as low energy RHIC cooling program (LEReC) at BNL, a low energy electron-ion collider based on HIAF at IMP and a Medium energy Electron-Ion Collider (MEIC) at JLab, since the hadron beam energies are in a range from several GeV to 100 GeV, the required electron energy is up to 55 MeV. Such high energy electron beams can only be provided by a RF/SRF linac. As a result, the electron beam is highly bunched. Cooling of ions by a bunched electron beam has never been realized before, thus it becomes a critical R&D to these projects. Recently we proposed a proof-of-concept experiment to demonstrate cooling by a bunched electron beam utilizing an existing DC cooler at IMP. Here we present a progress report of this experiment. We briefly describe the experiment and show the design parameters. We then report hardware installation and results of the bench tests. We also summarize the results of the cooling simulation studies and discuss the required beam measurement capability. | ||
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |