Biannual Report 1999/2000

The Project Group ESRF-Beamline published its second bi-annual report in June 2001, with the signature FZR-322.

Cover of the biannual RPBL report 1999/2000

Preface

The second report from the Project-Group ESRF-Beamline of the Forschungszentrum Rossendorf covers the period from July 1999 until December 2000. The ROssendorf BeamLine (ROBL) at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France performed quite well during this time. In the beamtime used by the FZR and collaborating institutes 44 scheduled experiments were performed, while in the ESRF scheduled beamtime 12 experiments. Additionally, a distinct amount of beamtime was devoted to in-house research of the FZR and methodical experiments.

The main effort from the technical point of view during the reporting period was made in the improvement of equipment. At the radiochemistry end-station a closed cycle He cryostat was commissioned and a newly developed control software XATROS for control and data acquisition in the EXAFS/XANES experiments was installed. At the materials research end-station an analyser system in front of the detector and the two-dimensional CCD-detector were commissioned during the period. Additionally, a small chamber for in situ structural studies of thin films during sputter deposition was designed and commissioned. Two of the following contributions demonstrate as examples the new scientific possibilities with this equipment.

Since February 2000 ROBL is part of the European Commission's programme "Access to Research Infrastructure" which supports user groups from member and associated states of the EU during experiments at ROBL. In the year 2000 ROBL hosted 6 groups for experiments.

The "2nd Euroconference and NEA Workshop on Speciation, Techniques, and Facilities for Radioactive Materials at Synchrotron Light Sources" took place in Grenoble 10-12 September 2000. The FZR was main organiser of this workshop which was attended by over 70 scientist from 10 countries.

The ROBL-CRG would like to thank all partners, research groups and organisations who supported its progress during the last 18 months. Special thanks are due to the FZR management, the CRG office and the Safety group of the ESRF.

The report is organised in three main parts. The first part contains extended contributions on results obtained at ROBL. The second part gives an overview about the scheduled experiments, publications, guests having visited ROBL with support of the EC, and some other information. Finally, the third part collects the experimental reports of the user groups received.

Dr. Wolfgang Matz
 

Contributions

Title and Authors Size in kB
A miniature sputter deposition chamber for in situ film growth studies by synchrotron radiation scattering
N. Schell, W. Matz, W. Neumann, J. Bøttiger, J. Chevallier, P. Kringhøj
244
In situ study of phase transformation at elevated temperature and correlated mechanical degradation of nitrogen implanted Ti-6Al-4V alloys
F. Berberich, W. Matz, E. Richter, N. Schell
112
X-ray waveguides at ROBL: New developments and applications
F. Pfeiffer , T. Salditt , N. Schell
280
EXAFS measurements of radioactive samples at low temperature
C. Hennig, T. Reich, H. Funke, A. Roßberg, S. Dienel, W. Oehme, U. Strauch, G. Bernhard
192
XANES and EXAFS measurements of plutonium hydrates
T. Reich, G. Geipel, H. Funke, C. Hennig, A. Roßberg, G. Bernhard
60
Local structure of Th complexes on montmorillonite clay mineral determined by extended X-ray absorption fine structure (EXAFS) spectroscopy
R. Dähn, A. M. Scheidegger, A. Manceau, B. Baeyens, M. H. Bradbury
80

 

Statistics

Overview about the beamtime distribution at ROBL

During the actual report period 50 scheduled experiments were performed at ROBL. The overall number of shifts (á 8 hours) delivered for these experiments is given in the table. The shifts are divided into experiments allocated in the CRG beamtime and such allocated in the ESRF time (maximum 1/3 of user beamtime). Additionally, about 100 shifts are used for in-house and methodical experiments during the report period.

The table also contains the number of user groups (excluding FZR groups), where the figures in brackets indicate how many groups came more than once the year. The total number of users visiting ROBL for the experiment, including FZR users permanently working at Rossendorf, is given in the last column. This figure demonstrates that the ROBL team in Grenoble has to make a significant organisational effort for running the experiments.

period Shifts
CRG experiments
Shifts
ESRF experiments
User groups Users (persons)
Aug-Dec 1999 135 25 8 (1) 77
Jan-Dec 2000 374 144 20 (5) 223

ROBL has to deliver 142 user shifts for ESRF users in every scheduling period. The two viewgraphs below (supplied by the CRG-office of the ESRF) show the total number of scheduled shifts and the ESRF part for all CRG beamlines. Note, that the statistical period of the ESRF of each year extends to January/February of the next year (first run). Therefore, the figures in the table above and the second viewgraph are slightly different.

Scheduled shifts: CRG and ESRF part for all CRG beamlines in 1999
Scheduled shifts: CRG and ESRF part for all CRG beamlines in 1999
 

Scheduled shifts: CRG and ESRF part for all CRG beamlines in 2000
Scheduled shifts: CRG and ESRF part for all CRG beamlines in 2000
 

Both viewgraphs show that ROBL is stable working. The experimental possibilities as well as the users request for beamtime is comparable to the most other CRG beamlines.

The following tables list up in detail the experiments performed. There are some experiments with a high number of shifts (>18) which are part of long term research programmes of the FZR or connected with the work of Ph.D. students.

Scheduled experiments at the radiochemistry end-station and experimental reports

Scheduled experiments at the materials research end-station and experimental reports

From the tables one can also extract the collaborating institutions using the experimental possibilities of ROBL.

The experimental reports were provided by the applicants of the research. The responsibility for the communicated results is at the users, ROBL made only minor changes concerning exclusively the layout. All reports received until May 2001 are included there.

Support of user groups by the European Commission

In the frame of the general programme "Improving Human Research Potential" of the European Commission (EC) ROBL is supported under the programme activity "Access to Research Infrastructure" since February 2000 for 3 years. Under the contract HPRI-CT-1999-00077 research groups from Member and Associated States of the EU can obtain a grant for experiments at ROBL.

ROBL publishes calls for proposals where the deadline for submission is given (March, September 2000, April 2001). A user selection panel established with approval of the EC decides which experiments will be performed at ROBL. At maximum 15 % of the beamtime is available for the EC supported user groups.

More information about this access way one can obtain by contacting our Web-site: http://www.fz-rossendorf.de/ROBL/access.html.

The performed experiments are included in the table and indicated by a second number beginning with EU-xxx.

List of EC supported users of ROBL

J. Bøttiger
University of Aarhus, Institute of Physics and Astronomy, Aarhus, Denmark, 20-02-38 (EU-M02)

G. Deves
CNRS, Laboratoire Chimie Nucleare et Analitique, Gradignan, France, 20-01-23 (EU-R06)

J. Gaca
Institute of Electronic Materials Technology, Warsaw, Poland, 20-02-37 (EU-M01)

I. Grenthe
Royal Institute of Technology (KTH), Department of Chemistry, Stockholm, Sweden, 20-01-26 (EU-R04)

K. Guerman
CNRS, Laboratoire Chimie Nucleare et Analitique, Gradignan, France, 20-01-23 (EU-R06)

F. Livens
University of Manchester, Department of Chemistry, Manchester, Great Britain, 20-01-28 (EU-R01)

K. Mazur
Institute of Electronic Materials Technology, Warsaw, Poland, 20-02-37 (EU-M01)

L. Moyes
University of Manchester, Department of Chemistry, Manchester, Great Britain, 20-01-28 (EU-R01)

K. Rasmussen
University of Aarhus, Institute of Physics and Astronomy, Aarhus, Denmark, 20-02-38 (EU-M02)

W. Reed
University of Manchester, Department of Chemistry, Manchester, Great Britain, 20-01-28 (EU-R01)

J. Sass
Institute of Electronic Materials Technology, Warsaw, Poland, 20-02-37 (EU-M01)

Z. Szabo
Royal Institute of Technology (KTH), Department of Chemistry, Stockholm, Sweden, 20-01-26 (EU-R04)

M. H. Vesvres
CNRS, Laboratoire Chimie Nucleare et Analitique, Gradignan, France, 20-01-23 (EU-R06)

M. Wójcik
Institute of Electronic Materials Technology, Warsaw, Poland, 20-02-37 (EU-M01)


List of publications