---
experiment:
    id: '398'
    experiment_category:
        - 'Gas phase chemical reaction'
    experiment_date: '2014-01-07'
    temperature: '40'
    relative_humidity: '5'
    seeded_experiment: ''
    type_of_seed: ''
    seed_concentration_units: ''
    initial_seed_concentration_value: ''
    fuchs_adjusted_surface_area: ''
    reaction_type:
        - 'Photooxidation'
    oxidant_name: 'Hydroxyl radical'
    ro2_main_fate: 'Autoxidation/Isomerization'
    ro2_lifetime_seconds: ''
    experiment_goals: 'To make ppbv levels of HPALDs and associated compounds and observe their response in the suite of instrumentation.  To photoxidize HPALDs and associated compounds and observe product species.  Determination if HPALD (or associated cmpds) contributes toward interference on OH instrument.'
    experiment_summary: 'Overall, the experiment went well.  Initial NO levels in the high NOx bag were ~500 pptv which we believe was a result of connecting the GTHOS instrument to the bag shortly before starting the experiment.  The HPALD compounds were formed overnight by photolyzing CH3ONO in the presence of isoprene under low levels of UV light, at 40C.  By 10AM HPALD levels were ~1.3 ppbv as observed by CF3O- CIMS, and isoprene had decayed by a factor of 2.  After the initial rapid NO decrease to stationary level (~70 pptv), NO remained stable over the low light portion of the experiment.  After instrumentation began sampling the reaction products, the low level UV lights were turned off, and then temperature was ramped down to 25C, and then back up to 40C over the period of an hour.  Next, 20% of chamber UV lights were turned on for 45 miniutes, and then 100% UV lights were illuminated for approx. 1.5 hrs.  When the high level of UV lights were turned on, the AMS detected particle nucleation, and NO3- CIMS observed increases in several ion signals.'
    additional_notes: "Instrument Status:\r\nTD LIF - up\r\nPTRMS - up\r\nGTHOS - up\r\nLIF OHR - Down, to conserve gas, and setup dilution.\r\nCRM OHR - up\r\nNO CL - up\r\nGLY LIP - down \r\nFOR LIF - down \r\nI/A CIMS - up\r\nNCIMS - up\r\nRHTO3 - up\r\nGC FID - up\r\nAMS - up\r\nTQC1 - up\r\nTQC2 - up\r\nTOFCIMS - up\r\n\r\nTimeline (UTC, hrs, January 7, 2014):\r\n04:45 - Set chamber T setpoint to 40C\r\n05:15 - NO, GTHOS, CF3O- sampled bag background\r\n05:45 - Stopped sampling from bag. Injected CH3ONO into bag (500 ml bulb with 1.6 torr @ 295K)\r\n05:56 - Inected 2.4 ul isoprene into bag\r\n06:10 - Resumed sampling from bag (NO, GTHOS, CF3O-)\r\n07:04 - Lights turned on (2 UV bulbs, mounted on north wall of chamber)\r\n07:30 - GTHOS stopped sampling\r\n18:00 - Most instruments started sampling\r\n18:36 - Lights turned off\r\n19:06 - Set chamber T setpoint to 25C\r\n19:38 - Set chamber T setpoint to 40C\r\n20:23 - Lights turned on (20% of lights)\r\n21:08 - More lights turned on (100% lights)\r\n22:44 - Lights turned off\r\n23:45 - Stopped sampling, flush bag, Set chamber T setpoint to 25C"
    light_flux_characterization_id: '20'
    particle_loss_characterization_id: ''
    vapor_loss_characterization_id: ''
    data_file_original_name: '20140107_expTimeline.csv'
    oxidant_concentration_units: 'molecules_per_cubic_centimeter'
    initial_oxidant_concentration_value: '4.1e4'
    reactants:
        -
            is_aerosol: ''
            pubchem_cid: '6557'
            reactant_name: 'ISOPRENE'
            not_in_pubchem: ''
            functional_group:
                - 'Alkene'
            concentration_units: 'parts_per_billion'
            functional_group_other: ''
            initial_concentration_value: '30'
        -
            is_aerosol: ''
            pubchem_cid: '12231'
            reactant_name: 'Methyl nitrite'
            not_in_pubchem: ''
            functional_group:
                - 'NOx'
            concentration_units: 'parts_per_billion'
            functional_group_other: ''
            initial_concentration_value: '40'
    skip_headers_timeline: '1'
    condensation_sink_rate_coefficient: ''
    is_draft: ''
    pressure: '750 Torr'
    doi: 'https://doi.org/10.5065/an1v-cf83'
    download_file_path: 'experiments/EXP_398.zip'
    experiment_link: 'https://icarus.ucdavis.edu/experiment/398'
    experiment_set_name: 'FIXCIT experiments'
    experiment_set_link: 'https://icarus.ucdavis.edu/experimentset/162'
    chamber_link: 'https://icarus.ucdavis.edu/chamber/545'
    chamber_name: 'Seinfeld chambers'
    experiment_name: '2014 FIXCIT Study_20140107_ISOPRENE/Methyl nitrite_Hydroxyl radical_No Seed_Isoprene + OH "slow chemistry" (isomerization), dry, 40C, no seeds'
    experiment_created_at: '2020-09-05 17:52:45'
    experiment_updated_at: '2021-10-07 00:51:22'
chamber:
    id: '545'
    name: 'Seinfeld chambers'
    chamber_flow_mode: 'Batch'
    chamber_shape: 'Rectangular Prism'
    chamber_volume_in_cubic_meters: '22'
    chamber_surface_area_in_square_meters: '48'
    flow_through_rate_in_liters_per_minute: ''
    chamber_body_material: 'Teflon'
    chamber_body_thickness_in_mils: '2'
    bag_replacement_date: ''
    bag_replacement_frequency: 'As needed'
    chamber_cleaning_method:
        - 'Flushing with air'
        - 'Flushing with air with UV lights on'
        - 'Oxidation'
    o3_background: '< 0.5 ppb'
    nox_background: '40 ppt'
    particle_background: '< 0.01 ug/m3'
    air_filtration_method: 'Custom filtration canisters to remove NOx, hydrocarbons, water, particles, ozone, SOx from pressurized ambient air.'
    mixing_fans: '1'
    mixing_fan_material: 'Pulsed air jets, manually actuated'
    temperature_control: '1'
    temperature_measurements_recorded: '1'
    temperature_range_min_degrees_celsius: '10'
    temperature_range_max_degrees_celsius: '45'
    humidity_control: '1'
    humidity_measurements_recorded: '1'
    relative_humidity_range_min_percent: '4'
    relative_humidity_range_max_percent: '90'
    particle_experiment_capability: '1'
    lights: '1'
    light_source_type: 'UV black lamps (350 nm centered)'
    link_to_supplemental_information: 'https://www.worldscientific.com/doi/abs/10.1142/9789813147355_0001'
    additional_notes: ''
    organization_id: '551'
    created_at: '2020-01-10T00:38:23.000000Z'
    updated_at: '2020-01-14T06:45:36.000000Z'
experimentSet:
    id: '162'
    name: 'FIXCIT experiments'
    experiment_set_description: 'The Focused Isoprene eXperiment at the California Institute of Technology (FIXCIT) was a collaborative study at the atmospheric chambers of Caltech during January 2014. FIXCIT is the laboratory component of SOAS, and is aimed toward (1) better understanding the chemical details behind ambient observations relevant to the southeastern United States, (2) advancing the knowledge of atmospheric oxidation mechanisms of important biogenic hydrocarbons, and (3) characterizing the behavior of field instrumentation using authentic standards. A series of chamber experiments was conducted to investigate the oxidation of isoprene, ?-pinene, methacrolein, pinonaldehyde, acylperoxy nitrates, isoprene hydroxy nitrates (ISOPN), isoprene hydroxy hydroperoxides (ISOPOOH), and isoprene epoxydiols (IEPOX). Pinonaldehyde and isomer-specific standards of ISOPN, ISOPOOH, and IEPOX were synthesized, enabling study of the oxidation mechanisms and instrument responses for these compounds.'
    chamber_id: '545'
    created_at: '2020-01-14T07:02:33.000000Z'
    updated_at: '2021-10-12T07:57:29.000000Z'
    time_units: 'Seconds past midnight'
    publications:
        44: 'https:/dx.doi.org/10.5194/acp-14-13531-2014'
    downloadFileSize: '52041446'
    download_file_path: 'experimentSets/EXPSET_162.zip'
    collaborators:
        -
            name_first: 'Allen'
            name_middle: 'H.'
            name_last: 'Goldstein'
            affiliation: 'UC Berkeley'
        -
            name_first: 'William'
            name_middle: 'H.'
            name_last: 'Brune'
            affiliation: 'Penn State University'
        -
            name_first: 'Ronald'
            name_middle: 'C.'
            name_last: 'Cohen'
            affiliation: 'UC Berkeley'
        -
            name_first: 'Delphine'
            name_middle: 'K.'
            name_last: 'Farmer'
            affiliation: 'Colorado State University'
        -
            name_first: 'Manjula'
            name_middle: 'R.'
            name_last: 'Canagaratna'
            affiliation: 'Aerodyne'
        -
            name_first: 'Douglas'
            name_middle: 'R.'
            name_last: 'Worsnop'
            affiliation: 'Aerodyne'
        -
            name_first: 'Jose'
            name_middle: 'L.'
            name_last: 'Jimenez'
            affiliation: 'University of Colorado Boulder'
        -
            name_first: 'Frank'
            name_middle: 'N.'
            name_last: 'Keutsch'
            affiliation: 'Harvard'
        -
            name_first: 'Saewung'
            name_middle: ''
            name_last: 'Kim'
            affiliation: 'UC Irvine'
        -
            name_first: 'Alex'
            name_middle: 'B.'
            name_last: 'Guenther'
            affiliation: 'UC Irvine'
        -
            name_first: 'John'
            name_middle: 'E.'
            name_last: 'Mak'
            affiliation: 'SUNY Stonybrook'
        -
            name_first: 'Geoffrey'
            name_middle: 'S.'
            name_last: 'Tyndall'
            affiliation: 'NCAR'
        -
            name_first: 'Denise'
            name_middle: 'D.'
            name_last: 'Montzka'
            affiliation: 'NCAR'
        -
            name_first: 'Andrew'
            name_middle: 'J.'
            name_last: 'Weinheimer'
            affiliation: 'NCAR'
        -
            name_first: 'Alam'
            name_middle: ''
            name_last: 'Hasson'
            affiliation: 'Fresno State'
organization:
    id: '551'
    lab_name: '2014 FIXCIT Study'
    lab_affiliation: 'California Institute of Technology'
    lab_currently_active: ''
    legal_constraints_statement: 'The Principal Investigator (PI) and institution retain any and all rights to the data that they generated. Use of ICARUS shared data in published materials or materials under review, including peer-reviewed publications or submissions, conference presentations, reports, and proposals, requires notification of the PI. For materials meant for dissemination that significantly depend on the data shared by specific PIs, the database user is required to offer the specific PI(s), and associated coworkers, co-authorship in said publications. When any of the ICARUS data are used in published materials, an acknowledgement statement should be included, recognizing the efforts of the ICARUS and NCAR DSET teams and support from the National Science Foundation.'
    access_constraints_statement: 'These data are openly accessible by all registered users. Accounts are available free of charge following the registration of user information with a valid email address.'
    additional_notes: ''
    created_at: '2020-01-10T00:15:51.000000Z'
    updated_at: '2020-01-11T04:55:16.000000Z'
    pi:
        -
            name_first: 'Paul'
            name_middle: 'O.'
            name_last: 'Wennberg'
            orcid: '0000-0002-6126-3854'
            phone: '626 395 2447'
            email: 'wennberg@caltech.edu'
        -
            name_first: 'John'
            name_middle: 'H.'
            name_last: 'Seinfeld'
            orcid: '0000-0003-1344-4068'
            phone: '626-395-4635'
            email: 'seinfeld@caltech.edu'
        -
            name_first: 'John'
            name_middle: 'D.'
            name_last: 'Crounse'
            orcid: '0000-0001-5443-729X'
            phone: '626-395-8655'
            email: 'crounjd@caltech.edu'
        -
            name_first: 'Tran'
            name_middle: 'B'
            name_last: 'Nguyen'
            orcid: '0000-0001-9206-4359'
            phone: '5307525987'
            email: 'tbn@ucdavis.edu'
    data_manager:
        -
            name_first: 'Tran'
            name_middle: 'B.'
            name_last: 'Nguyen'
            phone: '5307525987'
            email: 'tbn@ucdavis.edu'

---
UTC_hr,Action
04:45,Set chamber T setpoint to 40C
05:15,NO/GTHOS/CF3O- sampled bag background
05:45,Stopped sampling from bag. Injected CH3ONO into bag (500 ml bulb with 1.6 torr @ 295K)
05:56,Inected 2.4 ul isoprene into bag
06:10,Resumed sampling from bag (NO; GTHOS; CF3O-)
07:04,Lights turned on (2 UV bulbs mounted on north wall of chamber)
07:30,GTHOS stopped sampling
18:00,Most instruments started sampling
18:36,Lights turned off
19:06,Set chamber T setpoint to 25C
19:38,Set chamber T setpoint to 40C
20:23,Lights turned on (20% of lights)
21:08,More lights turned on (100% lights)
22:44,Lights turned off
23:45,Stopped sampling; flush bag; Set chamber T setpoint to 25C