Surface-roughness wakefield measurements at brookhaven accelerator test facility.
نویسندگان
چکیده
An experiment has been carried out at the Brookhaven Accelerator Test Facility to investigate the effect of a surface-roughness wakefield in narrow beam tubes with artificially created bumps. The measurements show that the synchronous modes decay significantly due to the randomization of the roughness pattern. It is pointed out that this decay mechanism has not been investigated in the previous experiment at DESY and the investigators' conclusion does not apply for surface-roughness wakefields in real surfaces.
منابع مشابه
Experimental Results of a Plasma Wakefield Accelerator Using Multiple Electron Bunches
We present some preliminary experimental results of a plasma wakefield accelerator technique which utilizes multiple electron bunches in order to drive a plasma wave. The experiments were performed at the Accelerator Test Facility of Brookhaven National Laboratory where 5 8 equidistant bunches with a spacing that was varied between 100 250 m were fed into a 6 mm long capillary discharge plasma....
متن کاملGeneration of Electron Microbunches Trains with Adjustable Sub- Picosecond Spacing for Pwfa and Fel Applications
We use a wire mesh mask placed in a dispersive region of the Accelerator Test Facility (ATF) at Brookhaven National Laboratory to produce a train of equidistant drive microbunches followed by witness bunch. This type of electron microbunch structure is appropriate for plasma wakefield accelerator experiments. These experiments aim at demonstrating the enhancement of the accelerating field when ...
متن کاملTHz RADIATION GENERATION IN A MULTIMODE WAKEFIELD STRUCTURE*
A number of methods for producing sub-picosecond beam microbunching have been developed in recent years. A train of these bunches is capable of generating THz radiation via multiple mechanisms like transition, Cherenkov and undulator radiation. We utilize a bunch train with tunable spacing to selectively excite high order TM0,n modes in a multimode structure. In this paper we present experiment...
متن کاملIonization Chambers for Monitoring in High-IntensityCharged Particle Beams
Radiation-hard ionization chambers were tested using an intense electron beam from the accelerator test facility (ATF) at the Brookhaven National Laboratory (BNL). The detectors were designed to be used as the basic element for monitoring muons in the Main Injector Neutrino beamline (NuMI) at the Fermi National Accelerator Laboratory (FNAL). Measurements of linearity of response, voltage depend...
متن کاملOptimal Parameters of the Photocathode Gun Space Charge to Improve Beam Quality
Accelerator Test Facility at Brookhaven National Laboratory (BNL ATF) operates with 5 MeV photocathode gun and 70 MeV linac for different range of experiments with a few picoseconds and a few micrometers emittance electron bunch. Many conducted experiments require beam with good spatial resolution and short length as well. NdYaG laser pulse turns to the electron bunch in the gun with space char...
متن کاملذخیره 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 ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 89 17 شماره
صفحات -
تاریخ انتشار 2002