18 th Users Meeting PKU Beijing. Monday May 8-12, John Jayne

Transcription

1 18 th Users Meeting PKU Beijing Monday May 8-12, 2017 John Jayne

2 About Aerodyne Many of you know Aerodyne as, an instrument company Our full name is Aerodyne Research, Inc. Research is our core activity The instruments have evolved from our research interests

3 About Aerodyne Founded in late 1970 as a contract R&D organization Materials and defense research Combustion research Atmospheric chemistry (mesosphere, stratosphere, troposphere) Today we are about 80 employees, ~2/3 advanced degree Expertise in Physics, Chemistry, Mathematics, Fluid Dynamics, Computer Science, Chemical/Mechanical/Electrical/Aeronautical Engineering We do Laboratory and Field Measurements; Instrument Design, Development, Prototyping and Fabrication; Computer Modeling, Data Analysis. Support from R&D, sales of measurement services, sale of instruments Many collaborations with academic institutions and government laboratories.

4 Aerodyne Mobile Lab Vehicles Currently in central Texas measuring ozone producing VOCs May 2017

5 Research Centers at Aerodyne Six Centers of Technical Expertise CACC-Center for Aerosol and Cloud Chemistry CAEC - Center for Atmospheric and Environmental Chemistry CATD- Center for Aero-Thermodynamics CEPT - Center for Energy and Propulsion Technology COSR- Center for Optical Signature Recognition CSST - Center for Sensor Systems and Technology

6 CACC Research Group Focus Mass Spectrometry for the Study of SOA Sun VOC LVOC ELVOC Oxidation/processing SOA formation New particle Formation Condensation and growth Processing and aging GC PTR CIMS (I -, NO 3- ) APi Decreasing Volatility AMS Aerosol Composition Chemical and physical properties Goal: Combine lab and field measurements to chemically resolve gas to particle We also develop, build transformations and support instruments

7 Overview of Instruments 18 th Users Meeting PKU Beijing Monday May 8-12, 2017 John Jayne

8 AMS Users Community Annual Meeting Attendance 900+ Published Articles to date Attendees Oregon ARI ARI Caltech GA Tech Juelich MN Reno Manchester Canada Finland FL Minnesota Prague Korea Milan Portland Beijing 2017-Zurich InstrumentDeliveries_FY FL

9 Sept 2001 AMS Users Meeting at ARI SN 001 to 004 Lets talk about how the AMS works.

10 Aerodyne Mass Spectrometer Systems Aerosol Instruments Gas Phase Instruments QAMS CTOF AMS HTOF AMS SP HTOF AMS CTOF mini-ams LTOF AMS QACSM etof ACSM APi TOF IMS TOF EI-TOF PTR MS Most instruments available with C, H or L ToFMS Sources IMR (I-, SF6-, H3O+, Acetate, ) Nitrate (NO3-) FIGAERO Tofwerk, AG Mass Spec Partner

11 Other Aerodyne Instruments and Components Instruments TILDAS (IR trace gas measurement) CAPS (NO2, PMex, SSA) TWST (Cloud optical depth) DPAS (BC conc. Zhenghong Yu) ARISense (Air quality monitoring package) Components SP Soot Particle module LS Light Scattering module Aerosol Dryer Thermal Denuder PAM Andy Lambe Pressure Controlled Inlet EyeOn control system Beam Width Probe Auto Valve System

12 Aerosol Mass Spectrometer Particle Beam Generation Aerodynamic Sizing Particle Composition Aerodynamic Lens High Performance TOF mass spectrometer Beam Chopper Particle TOF Region Pumps (x5) ƒ44 Fast Data System Timers DACs Full PC Thermal Vaporization & Electron Impact Ionization

13 Soot Particle (SP) AMS DMT SP2 laser module laser power densities >0.2 MW/cm2 Intra-cavity laser (1064 nm) allows vaporization and detection of black carbon containing particles and absorbing metals. Work is focused on quantification. Onaschet al. AS&T 2012 Onaschet al. AS&T 2015

14 Long (L) TOF AMS 2x the resolution of HTOF (Vmode) with the same sensitivity. 2x the length of the HTOF 55 L x 24 D x 27 H, 275 lbs. [139.7 cm x 60.9 cm x 68.6 cm, kg]

15 Resolution of C-TOF, H-TOF and L-TOF Andy Lambe

16 Qualitative Comparison of LTOF to C- and HTOF Improved ability to report on elemental Nitrogen. Andy Lambe

17 What s the Difference between an AMS, mini-ams and an ACSM If it has a chopper it s an AMS -can do ptof sizing If it doesn t have a chopper it s an ACSM -no ptof sizing, mass spectra only A mini-ams is just a smaller AMS -a smaller vacuum system->less size resolution

18 Aerosol Chemical Speciation Monitor Particle Beam Generation No Sizing Smaller/lower cost Q- or TOF- Mass Spec Particle Composition Laptop Computer Aerodynamic Lens nm Particle Inlet (1 atm) Pumps (x3) Thermal Vaporization & Electron Impact Ionization

19 All AMS and ACSM Systems Share Some Common Features Particle aerodynamic lens A differentially pumped high vacuum system, efficient gas-particle separation Particle vaporizer Electron impact ionization source Mass spectrometer performance/cost

20 QACSM and ToF ACSM Systems QACSM etof ACSM Offered by esen Scientific Offered by Handix Higher performance version Faster data rate (~1 min). Good for routine monitoring

21 Sampling system, inlet plumbing PM2.5 Capability PM2.5 Particle lens Xu et al, AS&T 2017 Capture vaporizer First PM2.5 QACSM instrument - China deployments. Updates ACPD - Field characterization from Phil and of the Hong PM2.5 Aerosol during Chemical ACSM Speciation session. Monitor: insights into the composition, sources and processes of fine particles in Eastern China Yunjiang Zhang et al, 2017 Jiangsu EMC

22 ACTRIS-ACSM intercomparison Studies in Paris 2013 and European countries AMS partner ACSM-ACTRIS stations 15 mass spectrometers 13 QACSM, TOF ACSM, HTOF AMS Led by Jean Sciare, Vincent Crenn (LSCE), Evelyn Freney and Olivier Favez (INERIS)

23 Results of ACTRIS-ACSM intercomparison study are summarized in two AMT papers Crenn et al ACTRIS ACSM Intercomparison: Part I - Intercomparison of concentration and fragment results from 13 individual co-located Aerosol Chemical Speciation Monitor (ACSM). Atmos. Meas. Tech., 8, (2015) Frohlich et al, ACTRIS ACSM intercomparison Part 2: Intercomparison of ME-2 organic source apportionment results from 15 individual, co-located aerosol mass spectrometers. Atmos. Meas. Tech., 8, (2015)

24 ToF ACSM and mini-ams Systems etof ACSM ctof mini-ams Differences between ACSM and mamsare the MS, chopper and the DAQ system

25 High Resolution Chemical Ionization Mass Spectrometer - CIMS Accepts: IMR source NO3 source Figaero source Can be configured with various reagent ionization sources. Can also detect naturally occurring ambient ions - Api-TOF

26 TAG Organic Aerosol Speciation Thermal Desorption Aerosol GC/MS Collaboration with UC Berkeley and ADI Molecular identification for organic aerosol constituents TAG -CIMS TAG Collector Module and mini GC column/oven EI - HTOF GC HTOF System for VOC analysis coming

27 Potential Aerosol Mass (PAM) Oxidation Flow Reactor Andy Lambe, J. Jayne, W. Robinson, X. Cabral, S. Prescott Aerodyne Research, Inc. Bill Brune, Pennsylvania State University Kang et al. (2007), Lambe et al. (2011)

28 Thermal Denuder System For aerosol volatility studies

29 Aerosol Sample Dryer System

30 Light weight, low power (24V) Up to 10 LPM Compatible with Dryer system Sample Line Flow Controller System

31 CAPS Pmex and SSA Monitors Particle Extinction and Single Scattering Albedo 3-wavelength version now available Handix Andy Freedman/Tim Onasch/Phil Croteau

32 TWST - Three Wavelength Spectrally-agile Technique Cloud Optical Depth Sensor Application of oxygen A-band equivalent width to disambiguate downwelling radiances for cloud optical depth measurement Edward R. Niple et al., Atmos. Meas. Tech., 9, , 2016

33 Air Quality Sensor System Integrates 16 Measurements CO, NO, NO2, Ox, CO2 Particle size ~(0.4-17) um, 16 bins PM1, 2.5, 10 Wind speed, Wind direction Solar Sound/noise Barometric pressure Relative Humidity Temperature Data saved locally and to the web. Solar/battery power and AC power options Eben Cross

34

35 Installation of PKU Shenzhen HTOF-AMS for monitoring during the 2008 Olympics in Beijing Lingyan HE Xiaofeng HUANG Min HU

36 END