A Spintronic Semiconductor with Selectable Charge Carriers
Researchers found a semiconductor with two properties crucial for spintronics: a large Rashba effect (splitting of degenerate spin states) and ambipolarity (conduction via electrons and holes). Furthermore, it is possible to control whether the charge carriers are electrons or holes by engineering the surface layer. Read more…
From Protein Structure to Function: Ring Cycle for Dilating and Constricting the Nuclear Pore
Nuclear pore complexes (NPCs) serve as gatekeepers between a cell’s cytoplasm and its nucleus. Through crystallographic analyses at the ALS, researchers have elucidated the molecular architecture of the NPC transport channel. Read more…
As head of ALS User Services for the past six years, Sue Bailey’s main goal has been to make the ALS user experience as smooth and efficient as possible. “I am constantly looking for ways to improve the processes for users to apply* for beam time, register, complete their training, and coordinate experiments,” she writes. Read how Sue and her team are making life easier for new and returning ALS users.
Industry@ALS: TE Connectivity Finds Answers in Tomography
TE Connectivity is a world leader in connectivity–the $13 billion global company designs and manufactures more than 500,000 different electronic connectivity products for the automotive, energy, industrial, healthcare, aerospace, and defense industries. Recently, a team led by TE’s senior manager of materials development, Dr. Jerzy Gazda, has been investigating how ALS tomography capabilities on Beamline 8.3.2 can help the company develop more efficient connectors.Read the article.
Summer at the ALS = Opportunities for Teachers and Students
Zahid Hussain, Alessandra Lanzara, and Chris Jozwiak describe a new, highly efficient instrument for performing spin-resolved photoemission spectroscopy. Because it measures electron energy, angle, and spin, it is ideal for analyzing the spin-dependent electronic structure of materials for the electronics, computing, and semiconductor industries.
Have you ever seen a 23.5 ton undulator fly? Watch as one, retired from ALS Beamline 7.0.1, is transported out of the building and onto a truck for delivery to Fermilab in Illinois, where it will have new life as a beamline diagnostic tool.
This fall is shaping up to be a very exciting time for the ALS. If you haven’t yet heard about the possibilities of “diffraction-limited” storage rings, then stay tuned for many interesting discussions at the upcoming User Meeting (Oct. 7-9) and a workshop devoted to the new science that would be made possible by this type of upgrade. This is especially timely as we are celebrating the 20th anniversary of the ALS this year.
The UEC is also currently accepting nominations for the Shirley, Halbach, and Renner awards. The deadline is August 30, so send those nominations in now! Awards will be handed out during the evening reception of the first day of the User Meeting.
In addition, the ALS Scientific Advisory Committee (SAC) meeting is planned for September, and the UEC will be represented at the meeting. As always, if you have any news or comments relevant to the user experience at the ALS, please don’t hesitate to contact your UEC representatives.
All users are welcome to contact their UEC representatives to raise issues of concern relating to their own research, or to alert us to issues facing our whole community.
For the user runs from July 23 to August 18, 2013, the beam reliability [(time scheduled – time lost)/time scheduled)] was 95.9%. For this period, the mean time between failures (MTBF) was 40.8 hours, and the mean time to recovery (MTTR) was 112 minutes. There were no significant interruptions.
More detailed information on reliability is available on the ALS reliability bulletin board, which is located in the hallway between the ALS and the control room in Building 80. Questions about beam reliability should be directed to Dave Richardson (DBRichardson@lbl.gov, x4376).