RWEB Window requirements Ref: SCAM-30000-IRAP-SP-00607 Ed. 1 Rev. 0 Date: Oct/06/2016 Page: 1/13 Distribution restricted SPECIFICATIONS FOR THE RWEB WINDOWS OF SUPERCAM Concerned Models EDU STM EM EQM x FM x SP x All Document under Configuration Control x Prepared by Date and signature Laurent PARES Optical Architect Verified by Date and signature Pernelle BERNARDI System Engineer Approved and Application authorized by Date and signature Philippe CAIS Project Manager Summary: Specification for the procurement of the RWEB windows for EQM and FM Models of SuperCam. Keywords: Optics, RWEB Windows, SuperCam
PROJECT EXTERNAL DISTRIBUTION Laurent Parès Pernelle Bernardi Philippe Caïs Bruno Dubois Sylvestre Maurice Jean-Michel Reess René Perez
LIST OF ABBREVIATIONS
JPL Jet Propulsion Laboratory (NASA) MU Mast unit SCAM SUPERCAM instrument BU Body Unit LANL Los Alamos National Laboratory CT Calibration Targets LIBS Laser Induced Breakdown
Spectroscopy RWEB Remote Warm Electronics Box
EDU Engineering Development Unit EM Engineering Model EQM Engineering Qualification Model FM Flight Model SOW Statement Of Work SP Spare STM Structural and Thermal Model TU Testbed Unit
TABLE OF CONTENTS 1. CONTEXT OF THE MARS2020 PROJECT .......................................................................................................... 5
1.1. SUPERCAM INSTRUMENT CONCEPT ........................................................................................................... 51.2. SCOPE OF THE DOCUMENT ............................................................................................................................ 6
2. FUNCTIONAL AND PERFORMANCE REQUIREMENTS ............................................................................... 72.1. GENERAL REQUIREMENTS ..................................................................................................................................... 72.2. OPTICAL AND MECHANICAL REQUIREMENTS FOR RWEB WINDOWS PLATE ......................................................... 7
4. TEST PROGRAM ...................................................................................................................................................... 95. QUALITY ASSURANCE ........................................................................................................................................ 10
5.1. RESPONSIBILITY FOR INSPECTION AND TESTS ..................................................................................................... 115.2. NON CONFORMANCES ......................................................................................................................................... 11
6. STATEMENT OF WORK (SOW) ......................................................................................................................... 116.1. DELIVERABLE HARDWARE .................................................................................................................................. 116.2. PROPOSED REVIEWS AND MILESTONE SCHEDULE ................................................................................................ 11
1. CONTEXT OF THE MARS2020 PROJECT The Mars 2020 will launch in July 2020 a single Rover that will land and operate on the surface of Mars. M2020 intends to conduct a Mars Habitability investigation, with habitability defined as the “capacity of the environment to sustain life”, i.e., the potential of a given environment to support life at some time, past or present. The mission will focus on a roving, long-duration science laboratory that will provide a quantitative improvement in surface measurements and pave the way for future Martian surface and sample return missions. The assessment of habitability is to be made through multidisciplinary measurements related to biology, climatology, mineralogy, geology and geochemistry in terrain, which may include (depending on the site selected) sedimentary, hydrothermal and ancient deposits. The SuperCam instrument will provide powerful techniques to help the M2020 rover to reach those scientific goals.
1.1. SUPERCAM INSTRUMENT CONCEPT
The SuperCam instrument is an evolution from the successful ChemCam instrument on MSL-Curiosity. In addition to the existing geologic capabilities (Light Inducted Breakdown Spectroscopy), a new RAMAN biologic spectroscopic analysis is implemented, coupled to an IR spectrometer. To help context imaging, an improvement of the Remote Micro Imager is done with a new color detector.
The SuperCam package consists of three separate major units—“Body Unit” and “Mast Unit” and “Calibration Targets” (see Figure 1), which are further broken down into modular components. The Mast Unit is provided by IRAP (funding from CNES), while LANL (US) is building the Body Unit. The IRAP and LANL portions are entirely separate mechanically, greatly simplifying interface controls as well as development across international boundaries. The University of Valladolid (UVa) in Spain is primarily responsible for the SuperCam on-board calibration target assembly. The Mast Unit (MU) consists of a telescope with a focusing stage, a pulsed laser and its associated electronics, an infrared spectrometer, a color CMOS micro-imager, and focusing capabilities. A new development for SuperCam is separate optical paths for LIBS (“red line” in Figure 1) and Raman spectroscopy (“green line”), which produces a frequency-doubled beam. The Body Unit (BU) consists of three spectrometers covering the UV, violet, and visible and near-infrared ranges needed for LIBS. The UV and violet spectrometers are identical to ChemCam. The visible spectrometer uses a transmission grating and an intensifier so that it can double as the Raman spectrometer. The intensifier allows rapid time gating needed to remove the background light so that the weak Raman emission signals can be easily observed. A fiber optic cable as well as signal and power cables connects the Mast and Body units.
In addition, a set of calibration (CT) targets mounted on the Rover will enable periodic calibration of the instrument.
For the development program, the SuperCam instrument is made of a succession of models:
• EDU: Engineering Development Unit, a prototype fully functional but with limited performances • TU (EM – Engineering Model): Testbed Unit, refurbish of the EDU to be delivered to JPL to support
the JPL Testbed activities • STM: Structural and Thermal Model not deliverable used to check the mechanical and thermal
functions • EQM: Engineering Qualification Model, model to pass all the relevant environmental testing • FM: Flight Model to be delivered to JPL • FS: Flight Spares, some DEVICEs or sub-assemblies in case of FM failure.
1.2. SCOPE OF THE DOCUMENT
This document gives the specifications for 5 RWEB windows of the SuperCam instrument for the EQM and FM models (and 7 test coupons). In this document, the word DEVICE refers to the RWEB windows.
RWEBW-GE-001: The International System (SI) Metric Standard will be used. RWEBW-GE-002: A serial number (TBD) is given to each DEVICE and engraved on the side of each DEVICE.
2.2. Optical and mechanical requirements for RWEB Windows plate RWEBW-PE-001 Quantity 5 RWEBW-PE-002 Mechanical diameter 130 mm +0 -0.025 mm RWEBW-PE-003 Central thickness 3.5 mm +0.1 mm -0 mm RWEBW-PE-004 Material Fused Silica low-OH
Corning 8655 Ar F Grade Inclusion class 0 Homogeneity < 5 ppm
RWEBW-PE-005 Useful Area 120 mm +0.25 -0 mm centered +/-1 mm on the mechanical diameter
RWEBW-PE-006 Front face Plane RWEBW-PE-007 Rear Face Plane RWEBW-PE-008 Transmitted Wavefront
irregularity λ/4 @ 633 nm PTV on Useful Area λ/14 @ 633 nm RMS on Useful Area
RWEBW-PE-009 Wedge < 2.6 arcminutes RWEBW-PE-010 Coating on both faces MgF2 antireflection coating centered
at 400 nm with no absorption in the bandpass [245-2600] nm.
RWEBW-PE-011 Transmission Minimum transmission: 93% on [245 nm; 2600 nm]
Molecular: ≤1.0 10-7 g/cm² RWEBW-PE-014 Protective chamfers 0.2 mm max. width at 45°
Inclusion class 0 =
Total inclusion cross-section ≤ 0.03 mm Maximum size 0.1 mm
Note: the RWEB window transmits the [245 nm; 2600 nm] spectral band. This spectral band drives the choice of the material and the antireflection coating. The goal is to have a minimum transmission for the window of 93% on [245 nm; 2600 nm]. The manufacturer can propose alternative materials and coatings that meet the requirement, and that will be discussed with the project.
3.1.1. Storage, transportation and on-ground tests
Before launch, the DEVICE will stay on ground for a maximum duration of 5 years. The DEVICE will be switched on for tests and calibrations in class 100,000. The DEVICE will be stored and transported in a controlled environment (unless specified). RWEBW-EN-001: The DEVICE shall not degrade its functions or performance during storage and transportation in a controlled environment at ambient temperature (5 – 50°C) and ambient humidity (30% <RH < 70%) for 5 years.
3.1.2. Earth to Mars cruise
RWEBW-EN-002: The device shall not degrade its functions or performance during 10 months cruise in vacuum.
3.1.3. Exploitation Phase
The nominal exploitation phase on Mars will last 1.5 Martian year, i.e. 1005 Martian days (sols) or 1030 terrestrial days. The goal of the science team is to operate the SuperCam for, at least, 3 Martian years (called here “extended mission”). RWEBW-EN-003: The DEVICE shall not degrade its functions or performance during the entire nominal mission (1005 sols), and be functional up to the end of the extended mission (2010 sols).
3.2. Environment requirements
3.2.1. Atmosphere
Atmosphere on Mars is 7 mbar of CO2. RWEBW-EN-004: The DEVICE package shall operate in a CO2 environment, typically under pressure between 3 and 16 mbar. Note: a demonstration by test is not requested, except if the DEVICE is considered as sensitive to this environment. RWEBW-EN-005: The DEVICE package shall operate under 1 bar atmosphere, with 30% < RH< 70%, without any loss of performance, for tests on Earth, RWEBW-EN-006: The DEVICE package shall operate under vacuum (< 10-5 mbar), for test on Earth, and during Cruise.
RWEBW-EN-007: The DEVICE operating and non-operating temperature is [-128°C; +50°C]. RWEBW-EN-008: The DEVICE shall be qualified in the [-135°C; +70°C] temperature range. 4. TEST PROGRAM RWEBW-GE-003: For each different coating chamber, 7 coating witnesses should be manufactured and succeed the following test program.
Tests facilities for the radiation test Q7 can be provided to the manufacturer. Q1: Qualitative visual control of the elements. Done systematically before and after tests. Q2: Optical performance test. Q3: Moist heat test: 24 hours exposure to a temperature of +50°C (+/- 3°C) with a relative humidity of 90 to 95%. Q4: Thermal cycles: 10 cycles from -135°C to +70°C with 5°C/min maximum slopes and 3 hours levels under vacuum (10-5 mbar) or at ambient pressure (dry air). Q5: Scotch adherence test. Q6: Vacuum effect. The optical elements performances should not be altered by a vacuum pressure and return to normal atmospheric pressure. This can be also validated by analogy to previous realizations. Note: if facilities to measure the optical performance under vacuum are not available, Q6 test can be covered by thermal cycling under vacuum (Q4).
Q7: radiation test. The witness is exposed to gamma rays (2 krad cumulated dose) and to neutrons (4.3E+10 equiv. 1MeV neutron/cm²). Specific test facility can be provided. Q8: Cleaning test. Note: coupon n°7 will follow the 5 RWEB windows since the coating deposition. It will monitor the contamination (molecular and particulate) of the plates. 5. QUALITY ASSURANCE The manufacturer shall have established and implemented a PA system to ensure compliance with the requirements and other applicable documents as stated in this specification. A QA program will be enforced for the control of the materials, EEE parts, mechanical parts and processes, manufacturing, verification and acceptance tests of the DEVICE. The QA activities will coordinate all the manufacturer functions needed to provide documented evidence of the compliance of the quality requirements of the contract. General product assurance requirements applicable for SuperCam instrument are described in [RD01]. The design rules as defined in European space standards (ECSS). To lower the workload of the manufacturer, the SuperCam team could perform this verification. To ensure proper qualification of the DEVICE, the detailed processes shall be discussed between the SuperCam team and the manufacturer. Also, with respect to standard processes (such as soldering), the manufacturer shall assign certified operators to these activities. In order to better assess risk level and to possibly lower the qualification needs, the manufacturer should provide information related to previous qualifications if similar design has been used in the past. Clearly, the question to answer is: Is the SuperCam DEVICE an improved version of a previously designed DEVICE, with respect to vibration-shock-thermal requirements defined in this document? Traceability rules as defined in European space standards (ECSS) are applicable. Each DEVICE shall have its own follow-up sheet indicating information related to each step: name of the operation, tooling used, products used (e.g. type of glue and expiration date), process, name of the operator, date of the activity, comments if any issue occurred. Each model shall show a unique identification number/code. The SuperCam team will provide to the manufacturer, the product tree identification number. Any document or report should refer to this reference. Cleanliness: stringent cleanliness levels are required for the SuperCam instrument. This applies to particular and molecular contamination but also to bioburden (microbiological contamination). The best solution shall be discussed with the manufacturer. If cleanliness control is not possible on the DEVICE, a witness sample (at least one) and its usage shall be defined.
RWEBW-GE-004: individual packaging shall be designed to protect the DEVICE from any possible deterioration.
5.1. Responsibility for inspection and tests Except indicated otherwise, the supplier shall demonstrate the design adequacy and its compliance with the requirements. The supplier shall be responsible for performing the manufacturing, needed inspections and acceptance tests. RWEBW-GE-005: The supplier shall inform the customer ten (10) working days before the initiation date of the defined Inspection Points in order to attend it.
5.2. Non Conformances Any major non-conformance shall be provided to the SuperCam team within 2 working days. A non-conformance is major if, directly or as a consequence, any requirement is not met. RWEBW-GE-006: A list of minor or major non-conformances shall be provided prior delivery. 6. STATEMENT OF WORK (SOW)
6.1. Deliverable hardware The deliverable devices to provide are listed in Table 1. Witness samples: diameter 25.4 mm, thickness 4 mm, same material as the RWEB windows and coated simultaneously with the RWEB windows.
# Name Ref. Number of models 1 RWEB Windows RWEBW 5 2 Witness samples 7 3 Deliverable
documentation
Table 1: List of deliverable devices.
6.2. Proposed reviews and milestone schedule
For each model, SuperCam team expects to perform Key and Mandatory Inspection Points (KIP/MIP) as described below. A manufacturing flow chart shall be provided before starting any activity related to the purchase order, to allow the SuperCam team to define the MIP’s.
Items Delivery date Items 1 to 3 March 1st 2017 For each model, the following reviews (or telecons) are requested: Review Date Location Kick-off T0 defined when contract is
placed Manufacturer
Delivery Readiness Review T0 + 5 months Manufacturer 7. DELIVERABLE DOCUMENTATION RWEBW-GE-007: the manufacturer shall provide the list of documents in Table 2. Table 2: list of documents.
Doc ref # List of materials (format will be provided) List of processes (format will be provided) Cleaning procedure Certificate of conformance Minutes of meeting, KIP reports & MIP reports Drawings Non conformance reports Waivers Modifications PV control Compliance Matrix with regard to this specification with a test report
indicating: • The measurements of the optical surfaces parameters (WFE,
interferograms, mechanical dimensions). • Reflection or transmission curves • Roughness measurement. • Test program results
8. OFFER
8.1. Technical offer The technical proposal shall include the following:
• Presentation of the company, skills and heritage related to the product described in this document.
• Detailed presentation of concepts and solutions.
• Matrix of compliance: the supplier specifies for each requirement if compliance is checked by analysis or tests. Each non-conformance shall be justified.
• Schedule proposal. 8.2. Financial offer
The financial proposal shall detail the costs for the different tests listed in section 4 (at least Q4 and Q6) The financial offer must comply with CNRS conditions of purchase available on the following website link (in English): http://www.dgdr.cnrs.fr/achats/vous-etes-fournisseur/doc/CGA_CNRS_UK_2013.pdf
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