Landau Cavities at Max Ii

نویسندگان

  • Å. Andersson
  • M. Eriksson
  • M. Georgsson
چکیده

Passive Landau cavities have been built, installed and taken into regular operation in the MAX II ring. The purpose of the Landau damping system is twofold: to decrease the energy spread of the beam induced by coupled bunch oscillations and to increase the Touschek life-time. The cavities are of the pillbox type operated at 1500 MHz, the third harmonic of the main RF. This paper describes the design and operational results of the cavities.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Landau Cavities in Third Generation Synchrotron Light Sources

The new 3 generation synchrotron light sources coming up are designed for a small transverse emittance. But the small beam size gives a low Touschek lifetime and calls for good beam stability. In some storage rings higher harmonic cavities are installed for bunch lengthening to overcome the lifetime limitations. The higher harmonic cavities also induce Landau damping that improves the beam stab...

متن کامل

Bunch Length Measurements with Passive Harmonic Cavities for Uniform Fill Patterns in a 100 Mhz Rf System

The MAX IV facility includes two storage rings operated at 1.5 GeV and 3 GeV. Both rings make use of a 100 MHz RF system and are designed to operate with a uniform multibunch fill pattern as well as employ passive harmonic cavities to damp instabilities and increase Touschek lifetime. Recently, a discussion on timing modes at the MAX IV storage rings has been initiated by the user community. Th...

متن کامل

Temperature dependence of the superheating field for superconductors in the high- London limit

We study the metastability of the superheated Meissner state in type II superconductors with 1 beyond Ginzburg-Landau theory, which is applicable only in the vicinity of the critical temperature. Within Eilenberger’s semiclassical approximation, we use the local electrodynamic response of the superconductor to derive a generalized thermodynamic potential valid at any temperature. The stability ...

متن کامل

A Superconducting Landau Accelerator Module for Bessy Ii

The installation of a 3rd harmonic Landau accelerator module is planned at BESSY II to improve the beam lifetime. The passive cavity shall provide an accelerating voltage up to 500 kV for beam currents from 10 to 500 mA. A CESR Phase-III cavity [1], scaled to 1.5 GHz, will be used. The cavity design provides strong damping of higher-order modes by ferrite loads on the beam tubes. A new module, ...

متن کامل

Transition to a Superconductor with Insulating Cavities

– An extreme type II superconductor with internal insulating regions, namely cavities, is studied here. We find that the cavity-bearing superconductor has lower energy than the defectfree superconductor above a critical magnetic induction B∗ for insulating cavities but not for metallic ones. Using a numerical approach for the Ginzburg-Landau theory we compute and compare free energy densities f...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1998