Environmental Sciences Department

BNL Environmental Sciences Dept.BNL Environmental Sciences Dept.and EnviroSuite:and EnviroSuite:

from NSLS to NSLS-IIfrom NSLS to NSLS-II

Jeff FittsJuly 18, 2007

Environmental Researchand Technology

Division

Environmental Sciences Department

EnviroSuite Strategic InitiativeEnviroSuite Strategic InitiativeInitiated in 2002 by BNL Environmental Sciences Dept.; BNL and DOE BER support for program

Mission: Explore and quantify complex environmental processes and systems to better understand the long-term fate and transport of contaminants in the environment and to help develop technologies for long-term stewardship

Approach:

Develop & expand novel synchrotron-based techniques for exploring complex environmental processes

Support Environmental Science users

Environmental Sciences Department

Complex real-world samplesComplex real-world samples• Heterogeneous materials • Low contaminant concentrations• Non-destructive & preserved environment

Mineral/water interfacesMineral/water interfaces• Derive atomic-level picture• Test predictive models

Microbes and model particlesMicrobes and model particles• Focus on predominant processes• Molecular details of transient species

Improve Improve predictions of predictions of contaminant contaminant behaviorbehavior

Methods: bulk and micro-XAS & XRD

Methods: in-situ & Quick XAS, PDF

Methods: Grazing incidence XAS; XSW; CTR

Environmental Sciences Department

EnviroSuite involvement at NSLS beamlinesEnviroSuite involvement at NSLS beamlines

• X27A (CU member): Hard X-ray microprobe

• X11A, X11B (Manage PRT): Bulk XAS

• X15B (Manage PRT): Bulk XAS at 1-5 keV

• X1A (PRT member): Soft X-ray STXM

Environmental Sciences Department

Future research directions enabled by NSLS II

• XAS studies of lower concentration samples, approaching real-world concentrations

• Pore-scale transport processes captured using microprobe/fluorescence tomography

• Sub-cellular features using x-ray microscopy and nanoprobe

• Fundamental research in interfacial chemistry mineral-water-organic-biological systems

Environmental Sciences Department

Projected NSLS-II FacilitiesProjected NSLS-II FacilitiesSource: Specialized

IDsDamping Wiggler

3-pole w. (or equiv.)

Soft Bend IR

Core Interests:

STXM Microprobe

XAS

Microprobe Tender XAS

Microprobe Microscopy

Supporting interests:

Nanoprobe

SAXS

Time-resolved XRD/PDF XRD/PDF

XRD/Surface XRD

Sample Stage/Enclosure: Controlled environment for reactive or

radioactive, nano materials

Environmental Sciences Department

Hard X-ray MicroprobeHard X-ray Microprobe• 0.3-15 micron tunable resolution• Stable beam position over 1000eV• Stable/repeatable energy calibration• High quality optical imaging• Simultaneous XRF and XRD• Microtomography

• Conventional K-B optics• Damping wiggler vs hard bend…

Environmental Sciences Department

Bulk XAS (damping wiggler)Bulk XAS (damping wiggler)Two operating modes: • 1. High flux 4-35 keV at standard energy

resolution (2x10-4)• For low concentrations, GIXAS, etc.

• 2. High energy resolution 5-50 keV• 1x10-5 or better (without extraordinary

measures)Requirements:

• Stable beam position over 1000eV, energy stability/repeatability, environmental end station

Add these capabilities for DW microprobe

Environmental Sciences Department

““Tender” 1-5 keV X-ray beamlinesTender” 1-5 keV X-ray beamlines

1. Bulk XAS: • Macro focused beam (1mm)• Energy and positional stability• He atmosphere end station• NSLS-developed Si detector

2. Microprobe: • Duplicate (1), K-B second stage focus• 0.3-15 micron tunable spot size

Environmental Sciences Department

Environmental end stationEnvironmental end station

• High resolution positioning and optical imaging

• Sample cooling and interchangeability• Operable as:

• 1. Open air• 2. Exhaust hood/clean stage for nano and

rad materials• 3. Controlled atmosphere glove box

• Valuable for other disciplines as well

Environmental Sciences Department

Supporting, developing interestsSupporting, developing interests• Nanoprobe

• Subcellular structures related; Nanoparticles and nanoscale coatings

• STXM beamline with improved spatial resolution and brightness

• IR microscopy and microspectroscopy• SAXS• Time-resolved XRD & PDF• Full-field microscopy• Quick EXAFS

Environmental Sciences Department

Development strategyDevelopment strategyAssemble pieces and programs at NSLS:• Existing beamlines and collaborationsNew programs from elsewhere:• SAXS, PDF, surface diffraction…Community involvement:

• EnviroSync organization, summer workshopGeography: • Sector: canted damping wigglers, hard

bend, soft bends, supporting lab