Transcript X-Ray

LCLS Detector Development Plans
John Arthur
April 7, 2005
X-ray detectors
John Arthur
[email protected]
The Problem
LCLS experiments are expensive and pulsed
Data comes all at once
Want to collect all the data
Current x-ray area detectors are not good enough
Too slow, too noisy, etc
Getting money for detector development is hard
April 7, 2005
X-ray detectors
John Arthur
[email protected]
How can the LCLS project help?
Use project funding for some detector development
PIXEL project can also fund detector development
April 7, 2005
X-ray detectors
John Arthur
[email protected]
The Plan
LCLS project has allocated about $3.5M for development of
a prototype 2-d x-ray detector
PIXEL project intends to fund detector development at a
comparable level
April 7, 2005
X-ray detectors
John Arthur
[email protected]
Recent Developments
LCLS Detector Advisory Committee formed
LCLS and PIXEL agree to coordinate, specify detectors for
specific experiments
April 7, 2005
X-ray detectors
John Arthur
[email protected]
Detector Advisory Committee
Gareth Derbyshire (Rutherford Appleton), chair
Yoshiyuki Amemiya (Univ. Tokyo)
Eric Eikenberry (PSI)
Erik Heijne (CERN)
Lothar Strueder (Univ. Munich)
Albert Walenta (Univ. Siegen)
April 7, 2005
X-ray detectors
John Arthur
[email protected]
Detector Development within PIXEL
PIXEL anticipates funding a 2-d detector
Groups that proposed detector development to the LCLS
SAC were invited to submit expanded proposals to the
LDAC last winter
LDAC met in February to discuss the proposals
Based on LDAC report, PIXEL plans to initiate a
collaboration with BNL to develop a 2-d detector in the
2005-2008 time frame
April 7, 2005
X-ray detectors
John Arthur
[email protected]
The LDAC and LCLS
LCLS asked LDAC to also consider the proposed 2-d
detector collaboration with Cornell
Based on their report, LCLS will continue with the Cornell
collaboration, and also initiate a collaboration with LBNL to
develop a fast x-ray streak camera
April 7, 2005
X-ray detectors
John Arthur
[email protected]
Two technologies
Cornell detector
Si diode pixel array detector
Detector array is bump-bonded to individual electronics
for each pixel
BNL detector
Si diode array with transistor gating
Read out row by row to electronics
Wire bonding between detector and electronics
April 7, 2005
X-ray detectors
John Arthur
[email protected]
Other detectors in LCLS
Several less ambitious projects
Streak camera (LBNL)
Beam imaging cameras (LLNL)
Intensity monitors (LLNL)
April 7, 2005
X-ray detectors
John Arthur
[email protected]
Summary
LCLS and PIXEL will fund parallel efforts to develop highperformance 2-d x-ray detectors, using different
technologies
LCLS will also fund less ambitious detector development
projects
Streak camera
Beam imaging cameras
LDAC will continue to provide guidance
April 7, 2005
X-ray detectors
John Arthur
[email protected]