NSLS Activity Report 2006 - Brookhaven National Laboratory

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ALLOCATION PANEL The Allocation Panel allocates general user beam time to both new proposals and beam time requests based on ratings provided by the Proposal Study Panels. Members are drawn from the scientifi c community and generally serve a twoyear term. BIOLOGY-PX Marc Allaire, BNL-NSLS Annie Heroux, BNL-Biology EXAFS Jeffrey Fitts, BNL-Environ. Sci. Syed Khalid, BNL-NSLS IMAGING AND MICROPROBES James Ablett, BNL-NSLS Kenneth Evans-Lutterodt, BNL-NSLS Antonio Lanzirotti, Univ. of Chicago Lisa Miller, BNL-NSLS IR/UV/SOFT X-RAY Larry Carr, BNL-NSLS VUV ALLOCATIONS Elio Vescovo, BNL-NSLS POWDER/SINGLE CRYSTAL/HIPRESS/OPTICS Zhong Zhong, BNL-NSLS SCATTERING Elaine DiMasi, BNL-NSLS Cecilia Sanchez-Hanke, BNL-NSLS Jean Jordan-Sweet, IBM Christie Nelson, BNL-NSLS Lin Yang, BNL-NSLS 4-6
ACCELERATOR DIVISION REPORT James B. Murphy Associate Chair for Accelerators Organization and Mission The NSLS Accelerator Division (AD), headed by James B. Murphy, is organized into two sections: the Storage Ring & Insertion Device Section (SR&ID), headed by Boris Podobedov, and the Linear Accel erator (Linac) Section, headed by Xijie Wang. In addition to the NSLS accelerator complex, the AD staff operates the Magnetic Measurements Laboratory (MML) and the Source Development Laboratory (SDL), which are led by Toshiya Tanabe and Xijie Wang, respectively. The NSLS Accelerator Division has a four-part mission: ● To ensure the quality of the electron beam in the existing NSLS booster, linear accelerator, and x-ray & vacuum ultraviolet storage rings ● To participate in the NSLS-II project, in particular the design of the storage ring and injection system ● To operate the MML and the SDL ● To perform fundamental research and development in accelerator and free-electron laser physics. 2006 Activities NSLS Accelerator Complex The AD staff performed studies to improve the efficiency and diagnostics of the NSLS injection system. The studies resulted in identifying a loss region near the extraction septum in the booster and led to a better understanding of the injection system performance. Improvements in the diagnostics and controls of the injection system provided for measurement of the electron beam position in the booster at anytime during the booster ramp. Dur- James Murphy 4-7 ing the NSLS May shutdown, the AD staff assisted the Operations and Engineering Division (OED) staff in replacing a 40-year-old klystron with a rebuilt tube resulting in a significant improvement in the reliability of the NSLS linac system. Close cooperation of all the NSLS divisions contributed to the successful commissioning of the new X25 mini-gap undulator (MGU) after its installation in the winter shutdown. The commissioning included establishing the correct undulator elevation, calculation of the proper trip points for the active interlock system, and assessing the impact of the new insertion device on the beam dynamics and lifetime of the X-ray ring. The Task Force on Orbit Stability generated its final report and concluded that no major problems were identified. The feed forward system to compensate for the elliptically polarized wiggler (EPW) was significantly improved by the OED staff. A procedure to regularly check the performance of the beam position monitoring (BPM) receivers with an RF calibrator is being explored. Development of the Middle Layer Toolkit for studying the properties of the VUV and X-ray storage rings continued to make progress. Automated scripts for the evaluation of accelerator parameters were deployed. The scripts provide for calibration of the correctors and BPMs, restoration of the lattice symmetry broken by gradient errors in the sextupoles, and estimation of the quadrupole gradients in the sextupoles due to closed orbit shifts. Studies to determine the minimum emittance coupling in the X-ray ring were very successful, and it was shown that the coupling ratio could be reduced to 0.3%. An improved characterization of the X-ray ring lattice at injection energy (750 MeV) will be launched in the near future. NSLS-II Project The accelerator physics staff of the AD provided the core team for the design of the NSLS-II accelerator complex, including the ultra-high brightness storage ring and the top-off booster injection system. A conceptual design report was prepared as part of the qualification process to achieve Critical Decision One (CD-1) approval from the Department of Energy for the NSLS-II project. While the primary emphasis of the NSLS-II project is the production of ultra-high brightness x-rays, it is highly desirable to continue to provide for stateof-the-art capabilities in the VUV and IR as well. For the IR region in particular, several options FACILITY REPORT
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NATIONAL SYNCHROTRON LIGHT SOURCE A
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NATIONAL SYNCHROTRON LIGHT SOURCE 2
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NSLS Summer Sunday Draws 650 Visito
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CHAIRMAN'S INTRODUCTION Chi-Chang K
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USERS' EXECUTIVE COMMITTEE REPORT C
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SCIENCE AT THE NSLS Kendra Snyder N
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Spin-Lattice Interaction in the Qua
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SOFT CONDENSED MATTER AND BIOPHYSIC
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grows. The magnesium also is attrac
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Chicago, Liangtao Li and Jerry Kapl
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STRUCTURE OF AN E. COLI MEMBRANE PR
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for 15 minutes at 180 °C, a 1 x 2
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Said collaborator Eliot Rosen, a ra
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AT THE NSLS, SCIENTISTS WORKING TOW
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NANOPARTICLE ASSEMBLY ENTERS THE FA
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Crystal structure of VCBP3 V1V2 sol
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National Laboratory; and Mati Meron
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X-RAY ANALYSIS METHOD CRACKS THE 'L
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the enzyme and the cofactor binds a
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ticles (Figure 1). The nearest-neig
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is about four times larger. The ver
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Figure 1. Ball model of the UO 2 (1
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of barium sulfate species formed up
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observed in the normal-state of the
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and calculate the contribution to t
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energy gap, responsible for suppres
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20%. Correspondingly, the Fe octahe
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We fit the data in Figure 1 by modi
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of the 1812 RF buckets of the ring
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from the laser, we allow enough tim
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scopic and microscopic characteriza
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suboxic boundary and a concomitant
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intensity of the CaP shoulder (Figu
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effectively combined to elucidate A
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ecomes evident through comparison o
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forming an electrostatic interactio
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promises the possibility of being a
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etween TPP and related compounds is
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(Figure 2). The negative charge on
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spots were observed in control brai
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malaria parasite to the red blood c
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of the resulting complex revealed t
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substrate the hydroperoxide form of
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of AlkB-∆N11 matches that in othe
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Figure 3. In catalysis, this array
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that form a central hydrophobic pat
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structural differences suggest that
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occurs between subunits located tow
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We used x-ray absorption near edge
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tonically as ξ increases (Figure 1
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These results demonstrated that a m
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position of the x-ray beam, pulse-h
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geneity ranges are observed with no
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PEGylated fluoroalkyl side chains r
Page 109 and 110: interface by annealing bilayer film
Page 111 and 112: β-phase takes place, giving rise t
Page 113 and 114: persion was followed by static and
Page 115 and 116: 411TH BROOKHAVEN LECTURE ‘ SHININ
Page 117 and 118: space. Its delivery of this materia
Page 119 and 120: NSLS RESEARCHERS PRODUCE A PRAISEWO
Page 121 and 122: in Farmingville, New York. She inve
Page 123 and 124: egan with three days of lectures an
Page 125 and 126: Participants in the 2006 “Take ou
Page 127 and 128: While Dehmer was optimistic about t
Page 129 and 130: Next, a talk on the “Engineering
Page 131 and 132: Energy Secretary Samuel Bodman (fro
Page 133 and 134: with majors ranging from history to
Page 135 and 136: described the first measurements of
Page 137 and 138: Visitors gather around the liquid n
Page 139 and 140: high-level degree in the physics fi
Page 141 and 142: Spotlight Awards The Spotlight awar
Page 143 and 144: A) B) Figure 1. X-ray fl uorescence
Page 145 and 146: BNL WINS R&D 100 AWARD FOR X-RAY FO
Page 147 and 148: 2005 Hans-Jürgen Engell Prize The
Page 149 and 150: 2006 NSLS TOURS 1/4/2006 Karen Agos
Page 151 and 152: 2006 NSLS SEMINARS 1/11/2006 Interi
Page 153 and 154: 2006 NSLS SEMINARS 6/22/2006 Strate
Page 155 and 156: 2006 NSLS WORKSHOPS 4/4/2006 X6A Wo
Page 157 and 158: NATIONAL SYNCHROTRON LIGHT SOURCE O
Page 159: NSLS ADVISORY COMMITTEES GENERAL US
Page 163 and 164: On-Axis Field (gauss) VTF Test Arti
Page 165 and 166: The NSLS has an aggressive preventi
Page 167 and 168: tific workshops, including “Synch
Page 169 and 170: ently the last one available in the
Page 171 and 172: functions, particularly at the nano
Page 173 and 174: A new Proposal Oversight Panel (POP
Page 175 and 176: SAFETY REPORT Andrew Ackerman ESH&Q
Page 177 and 178: BUILDING ADMINISTRATION REPORT Bob
Page 179 and 180: ing were cleaned, repaired, and pai
Page 181 and 182: FACILITY FACTS & FIGURES The Nation
Page 183 and 184: Beamline Source Technique Energy Ra
Page 189 and 190: NSLS BOOSTER PARAMETERS NSLS LINAC
Page 191 and 192: X-RAY STORAGE RING PARAMETERS AS OF
Page 193 and 194: PUBLICATIONS
Page 195 and 196: NSLS USERS Beamline U1A S Buzby, M
Page 197 and 198: A Nambu, J Graciani, J Rodriguez, Q
Page 199 and 200: Beamline X1A2 M Feser, B Hornberger
Page 201 and 202: C Mandel, D Gebauer, H Zhang, L Ton
Page 203 and 204: Beamline X7A E Anokhina, Y Go, Y Le
Page 205 and 206: T Moldoveanu, Q Liu, J Tocilj, M Wa
Page 207 and 208: Beamline X10A A Cisneros, G Mazzant
Page 209 and 210: S Kamtekar, R Ho, M Cocco, W Li, S
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Z Zhang, P Fenter, S Kelly, J Catal
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E Selvi, Y Ma, R Aksoy, A Ertas, A
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Y Suh, M Carroll, R Levy, G Bisogni
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S Park, E DiMasi, Y Kim, W Han, P W
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G Da, J Lenkart, K Zhao, R Shiekhat
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J Kaste, B Bostick, A Friedland, A
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X Chen, K Tenneti, C Li, Y Bai, R Z
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G Meinke, P Bullock, A Bohm, Crysta
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D Koller, G Ediss, L Mihaly, G Carr
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NSLS Activity Report 2006 - Brookhaven National Laboratory

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