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NSLS Beamlines:
X1A
,
X3A
,
X3B
,
X4A
,
X4C
,
X6A
,
X8C
,
X9A
,
X9B
,
X12B
,
X12C
,
X25
,
X26C
,
X29A
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| Beamline Website |
http://www.nsls.bnl.gov/beamlines/beamline.asp?blid=X4A |
| Owner/Operator |
New York Structural Biology Center |
| Operational (general use) |
Yes |
| %Time available (general use) |
25 |
| Beamline Schedule |
Not Available |
| Experiments |
MAD, SAD |
| Source |
Bending Magnet |
| Ring Current(mA) |
300 |
| Average Beam Lifetime |
20-40 hours, fill every 12 hours |
| Spot Size |
0.3H x 0.2V mm |
| Optics |
a KOHZU double crystal monochromator with a sagittally focused second crystal.
Two spherical mirrors, one will be rhodium coated. User choice of either mirror
depending on the desired energy
|
| Flux |
2 x 10E(10), x-Ray photons per second through a 200 um aperature at 300mA, 2.6 G eV, lambda 1 Ang
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| Flux Details |
Flux measured in 1997 corresponds to NSLS x-ray ring emittance of 90 nm-rad; NSLS x-ray ring emittance has improved to 45 nm-rad, and this has resulted in about a factor of 2 increase in the delivered fluxes. A more up-to-date sampling of the flux is not yet available.
|
| Wavelength Min (Å) |
. |
| Wavelength Max (Å) |
. |
| Monochromator |
? |
| Crystal type |
? |
| Mirrors |
? |
| Mirror Cutoff |
? |
| Special Capabilities |
? |
| Other Instrumentation |
? |
| Goniometer |
Huber Eulerian |
| Pin Length |
. |
| Restrictions |
. |
| xtal-detector Distance |
100-500 mm |
| Detector |
Quantum-4 CCD (ADSC) |
| Detector Details |
On Huber Eulerian cradle |
| 2theta range |
. |
| Cryo Capability |
Oxford Cryostream, temperature typically maintained at 100K. |
| Lab Facilities |
Biochemical lab with cold room |
| Biohazard |
Up to biosafety level BL-2 |
| Software |
Custom pXSCAN motion control software coupled with the ADSC ccd_sys data collection program.
|
| Hardware |
A Pentium 4 workstation running Linux Fedora Core 3 runs the ADSC program. A Pentium 3 running Windows 2000 runs pXSCAN. Data processing performed by twin Xeon Dell PC's running Linux along with SGI workstations. AMD Athalon XP3000 Windows XP machine used for backup.
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| Backup Devices |
Dual Layer 16x DVD backup as well as backup to external USB 2.0 and Firewire hard drives.
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