February 23, 2005: After a period of trials and errors, the UCLA-ATF chicane commissioning is well on its way.

February 23, 2005: In this experiment, the successful superposition of wake fields excited by 50MeV bunches which traveled ~50cm along the axis of a cylindrical waveguide that is lined with alumina was demonstrated.

March 19, 1999: The first phase of the Columbia-Yale Dielectric Wake Field experiment has been completed with another run this week.

Jan-March 2003: This is the first run at beamline IIIb after months of ATF shut down run.

Feb-March 2002: This signal allows one to deduce the electron beam induced beam field on the crystal, and the number of EO signal photons.

April-June 2002: The EO setup now has a motor that spins slowly enough for manual control of the optical phase - dc light level.

July-Sept 2002: We have realigned the optics to let the laser beam path select a location on the EO crystal different than that of the August 1 run.

March 2001: Fast Detector Group Progress in February-March 2001 Efforts in this period were focused on streak camera measurements of the rise time of electro-optical signals induced in LiNO3 crystals by the ATF beam.

August 2001: The first observation of a charged particle beam using the electro-optic (EO) effect was made by our group a couple of years ago with a continuous wave (CW) laser and the electron beam at ATF.

January 14, 2000: Since our pioneering observation of a charged particle beam by means of the electro-optical effect induced in a LiNbO_3 modulator crystal[1] at the ATF, our efforts have been focused on studying beam induced opacity in optical fibers.....

March 10, 2000: Recent runs, dedicated to the detection of the ATF beam bunches through the electro-optical effect with poled quartz optical fibers, were unsuccessful.

March 31, 2000: Results of the two abbreviated March runs were evaluated and plans for the three scheduled runs in April were discussed.

June 9, 2000: Recent measurements have led us to conclude that the poled fibers we tested lacked the necessary sensitivity required for charged particle beam instrumentation.

July 26, 2000: The two runs we had in this period were dedicated to detailed studies of beam effects in electro-optical (E-O) crystals while a new vacuum chamber containing the optical detection system was being prepared for rise time measurements with the streak camera.

January 2001: We have analyzed two runs that we determined to have excellent quality data.

May 2001: We took data using a 0.5 cm gap ceramic pad chamber and a 0.25 cm gap strip chamber.

Nov-Dec 2001: Detectors designed to monitor beam quality via muons and tolerate the high radiation environment of the MINOS/NuMI beamline at Fermilab were tested at the ATF facility for linearity, stability and saturation effects.

November 20, 2000: We will be testing ionization chambers at the ATF for the MINOS experiment at FERMILAB.MINOS stands for "Main Injector Neutrino Oscillation Experiment".

December 28, 2000: The test run on Nov 20-21 was successful in many respects. In broad terms, we learned how the ATF accelerator operates, we cleared many hurdles ......

February 18, 2000: This report is on the plans to perform tomography of the longitudinal phase space distribution of the ATF pulse.

March 10, 2000: We tried the longitudinal tomography beam study on March 7th 2000 and we had planned to measure the longitudinal phase space distribution with various laser energies (=various charges) and same rf-gun phase.

April 21, 2000: At the first, we checked the data taking program of Mathcad. Bob found some bugs in my program to save an image using the Frame Grabber system and we fixed them.

Nov-Dec 2001: The principle goal of this running period was to install and implement a compact spectrometer

March 31, 2000: Our principle goal of this running period has been:to reestablish communications with our UNIDEX stage controller which allows movement within the experimental chamber of the three stages.....

July 26, 2000: Our LABVIEW environment now permits stage manipulations and concurrent data acquisition so that stage scans can be done automatically and quickly.

July 9, 1999: We have established a reliable alignment procedure to start the run.

July 30, 1999: Without removing the alignment mirror and turning on the e-beam we immediately see a 150 mV signal.

April-June 2002: LACARA (laser cyclotron auto-resonance accelerator) is an “advanced concept” vacuum laser accelerator of electrons that is in the design and construction phase at the Accelerator Test Facility at Brookhaven National Laboratory.

February 2001: A new laser accelerator, LACARA (laser cyclotron autoresonance accelerator), will begin operation in October 2001.

August 2001: I believe we have passed all the safety issues for the LACARA Magnet to be both tested and then installed at the experimental floor.

Nov-Dec 2001: First experimental results are expected in about one year, but with lower laser power.

February 2001: The goal of the run was to understand the effects of the beam charge and longitudinal shape jitter on the resolution of the beam position measurement with RF cavities.

March 12, 1999: This week we received the report of the analysis of the two BPM runs made this year by the BINP-Protvino group headed by Vladimir Balakin.

November 19, 1999:Progress in the Linear Collider development requires methods to measure beam position with extremely high precision.

February 2001:

October-December 2002

April-June 2002 :We observed the interaction between an electron bunch and a laser pulse in a plasma channel.

July-Sept.2002: Just before the ATF shutdown we completed a one-week experiment run where the 60 MeV, 0.5 nC, 5 ps electron beam and 5 J, 180 ps CO2 laser beam propagated and counter-interacted in a plasma channel produced by a capillary discharge.

Oct.-Dec.2002: We report the generation of plasma wakefields by a single relativistic electron bunch and study of the focusing component of the fields.

September 2001: High-power laser guiding in plasma channels is a widely recognized way towards next-generation laser-driven electron accelerators where electrons move collinearly with the laser beam.

October 2001: In the previous ATF Newsletter of September 2001 we gave an account of the goals and status of the ATF study of the CO2 laser channeling in a plasma channel. Since then, we achieved the first demonstration of picosecond CO2 laser pulse channeling in plasma that we report here.

February 2001: A CO2 laser-driven linear acceleration experiment is being planned for the ATF.