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ALSNews Vol. 324 Print
Wednesday, 28 September 2011 00:00

Bioactive Glass Scaffolds for Bone Regeneration
Natural materials are renowned for their unique combination of outstanding mechanical properties and exquisite microstructure. Researchers at Beamline 8.3.2 have created bioactive glass scaffolds that mirror nature's efficient materials and may provide a means for previously problematic bone regeneration in large, load-bearing limbs. Read more...

Contact:  Q. Fu
Direct Imaging of Antiferromagnetic Vortex States
Despite intensive activity in the study of ferromagnetic (FM) vortex states, there has been no direct observation of such states in antiferromagnetic (AFM) microstructures. Researchers have now taken the first direct images of two types of AFM vortex states, one of which has no FM analogue. Read more...

Contact: Z. Q. Qiu
ALS Hosts Photon Factory Users

On August 31, the ALS welcomed a special group of Korean researchers for 24 hours of beam time on Beamline 8.3.1. Displaced from Japan's Photon Factory following the earthquake there last March, Dr. Jeong-Sun Kim's group turned to the ALS for a little help.


From left to right: Jane Tanamachi, Jeong-Sun Kim, Hye-Mi Park, George Meigs, Suk-Youl Park, Jeong-Hoh Park, Tae-Yang Kim.

Jeong-Sun studied at UC Berkeley for most of 2004 as a postdoctoral researcher in Dr. Sung-Hou Kim's laboratory, and was also was a member of the Berkeley Structural Genomics Center. At that time, Kim used Beamlines 5.0.1 and 8.3.2 to study the crystal structures of a type I restriction enzyme and a heat-inducible transcriptional repressor, amongst others.

Now, Jeong-Sun is an associate professor at Korea's Chonnam National University. He arrived at the ALS with one postdoctoral researcher, one doctoral fellow, and two masters students, one of whom had no previous experience in synchrotron data collection. In addition to collecting the data the group had hoped to collect at the Photon Factory, Kim used this trip as an opportunity to teach about collecting diffraction data at a synchrotron.

Jeong-Sun still studies restriction enzymes, which impart bacteria with immunity to viral infection. These enzymes are also invaluable tools for recombinant DNA technology, and by studying their atomic structure in detail, Jeong-Sun hopes to better understand how they work, leading to new advances in biotechnology and perhaps antiviral medicine.

Twelve Superlative User Weeks at the ALS
Twice this month, the ALS achieved a 12-week running-average reliability of over 99%--something without precedent, according to Dave Richardson. ALS performance is tracked on three 12-week running-average charts: reliability, (which shows what percentage of scheduled beam we deliver to users), MTBF (mean time between failures, which shows in hours how often, on average, the beam is unexpectedly interrupted), and MTTR (mean time to recovery, which shows in minutes how long, on average, it takes us to recover from unexpected beam losses). To smooth out any extremes and give a good extended-time sense of performance in these areas, a 12-week running average is used for each metric (each data point represents an average of the preceding twelve user weeks).

Additionally, the most recent 12-week running average for MTBF was above 78.5 hours, and the MTTR was 38 minutes. Click for Charts. Congratulations to all who helped achieve these successes!
ALS Science Makes for a Successful Science at the Theater
More than 400 attendees listened to a panel of ALS users speaking at the September 12 event, "Seeing the Light," a free Science at the Theater event held at the Berkeley Repertory Theater. Moderated by Roger Falcone, speakers Rachel Segalman, Axel Brunger, and Andrew Westphal discussed how their research at the ALS is paving the way for clean energy, improving medicine, and probing the mysteries of the universe. A video of the event is now available online.
ueccornerUEC Corner
User Meeting Is Next Week!

Greetings ALS Users,

The ALS User Meeting is around the corner, and we have an exciting program this year. In addition to an overview of progress at the ALS by Director Roger Falcone, we'll get an update on the DOE Office of Science by Dr. Harriet Kung. Dr. Mike Lubell of the American Physical Society will give an update on what the public and congress are thinking about science funding in the U.S. Our plenary lectures will cover a wide range of topics from plutonium science and diplomacy to climate change, drug discovery, and the future of lithography.

Back by popular demand this year will be the Student Poster Slam before the poster competition. If you missed this high-energy event last year, come see what the excitement is about. We will also have an open forum where you can ask questions of ALS management and your user representatives.

Finally, we'll be electing new members to the Users' Executive Committee, so cast your vote to make your voice heard.

If you haven't registered already, there is still timeregister here. I look forward to seeing you in Building 50 on the morning of October 3rd.

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.

Contact: David Osborn
opsinfoOperations Update
For the user runs from August 19 to September 19, 2011, the beam reliability [(time scheduled - time lost)/time scheduled)] was 99.8%. For this period, the mean time between failures (MTBF) was 188.2 hours, and the mean time to recovery (MTTR) was 48 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 ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it , x4376).

Long-term and weekly operations schedules are available on the Web. Requests for special operations use of the "scrubbing" shift should be sent to Rick Bloemhard ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it , x4738) by 1:00 p.m. Friday. The beam status in real time can be found on the ALS home page.

In This Issue
Bioactive Glass Scaffolds for Bone Regeneration
Direct Imaging of Antiferromagnetic Vortex States
ALS Hosts Photon Factory Users
Twelve Superlative User Weeks at the ALS
ALS Science Makes for a Successful Science at the Theater
Ring Leaders: Accelerator Operations and Development

ringleadersRing Leaders
Accelerator Operations and Development
Christoph Steier gives an overview of how ALS accelerator operation and development works to improve ALS reliability, performance, capacity, and more. Read the Article
announcementsAnnouncements
Science Café Today, Wednesday 9/28
Come to the ALS Science Café today at noon in the User Support Building's main conference room. Speakers include Alfred Mueller (BL 10.0.1), Ken Goldeberg (BL 11.3.2), and Josh Turner (BL 12.0.2). If you are interested in presenting in a future Science Café, please go to the ALS Science Café Web page.
discoALS User Featured on Daily Planet Special
ALS User Thomas Cahill's research is the focus of the first section of a special episode of the Discovery Channel Canada program "Daily Planet," marking the anniversary of the September 11 terrorist attacks. Cahill (DELTA Group, UC Davis) collected air samples about a mile from the site of the attacks and used ALS Beamline 10.3.1 to detect, measure, and analyze aerosols from the smoldering collapse piles of the World Trade Center. You can watch the program in its entirety on Daily Planet's website.
whosinthenewsWho's in the News
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