Attachment 01 - Draft SOW.pdf

Attachment 01 SOW

Advanced R&D Support for Modeling and Design of Vacuum Electronic Devices

STATEMENT OF WORK

1.0 INTRODUCTION

The Electromagnetic Technology Branch within Electronics Science and Technology Division (ESTD), Code 6800, of the US Naval Research Laboratory is the principal DoD center for technology of radiofrequency (RF) vacuum electronic devices. The Branch conducts research and development programs in vacuum electronics and related technologies that support Navy and DoD interests and capabilities in the full range of electronic combat functions. Moreover, the Branch administers the Navy exploratory development program in compact microwave, millimeter-wave power, and sub-millimeter-wave amplifier technologies, and cathode technologies, and serves as the focal point for the insertion of vacuum electronic technology into Navy engineering development efforts. Branch technical programs span a wide range of issues affecting vacuum electronics. Research objectives include investigations of beam-wave interactions that result in the generation of coherent electromagnetic radiation in a spectral range extending from the ultra-high frequencies (UHF) to the far infrared; high brightness beam optics;

surface science related to electron emission mechanisms; RF materials, millimeter wave component technology; thermal management; vacuum microelectronics; and advanced computational techniques for modeling electronic devices.

The goal of this task is to provide scientific and engineering support for development of accurate and computationally efficient modeling tools, design capabilities, and experimental validation capabilities for advanced vacuum electronics devices needed for Navy/DoD applications.

2.0 OBJECTIVE

The objective of this work is to provide Research and Development (R&D) capability to support ongoing vacuum electronic research (VE) within the Electromagnetic Technology Branch. The Branch performs VE modeling and simulations; code development, validation, and maintenance; passive and active device design and optimization; experimental characterization and data analysis; and materials development. The contractor shall provide Research, Development, Test Evaluation (RDT&E) support for these tasks. In the pursuit of these tasks, the contractor shall use his/her best efforts subject to the available funding.

3.0 SCOPE

The contractor shall provide associated research and development for a wide range of NRL research activities related to high-power, high-frequency vacuum electronics. The following task areas and descriptions indicate the specific nature of these research efforts.

4.0 TASK DESCRIPTIONS

4.1 Task 1: Theoretical Modeling and Algorithm Development

4.1.1. The Contractor shall perform research in electromagnetic theory and develop theoretical models relating to electron emission, electron beam transport, beam-wave interaction, electron beam collection, plasma physics, electromagnetic wave propagation, and electromagnetic interaction with structures and systems.

4.1.2. The Contractor shall develop physics-based computationally efficient algorithms suitable for accurate prediction of performance of vacuum electronic devices and high power microwave sources with axisymmetric electron beams as well as with advanced designs of beam-wave interaction regions.

4.1.3. The Contractor shall develop algorithms to optimize VE device performance according to user-defined single and/or multiple criteria: peak RF power; bandwidth;

efficiency; amplitude and/or phase linearity; and gain flatness over a specified frequency range. Successful algorithms shall demonstrate both accuracy and computational efficiency.

4.1.4. The Contractor shall develop algorithms for stability analysis of coupled-cavity and folded-waveguide TWTs to (1) band-edge oscillation at or near the π and 2π frequencies under conditions of zero radio-frequency (RF) drive power; (2) band edge oscillation at or near the π and 2π frequencies under conditions of high RF drive power (“drive induced oscillation”); (3) backward-wave oscillation, and (4) regenerative in-band oscillation.

4.1.5. The Contractor shall develop algorithms to predict the effects of finite fabrication tolerances and small variations in material properties in VE devices, including the effects on small-signal gain and phase for forward and backward wave interactions to control stability of the amplifiers.

4.1.6. The Contractor shall evaluate the algorithms for accuracy, computational efficiency, and numerical stability.

4.2 Task 2: Code Development, Validation, and Maintenance

4.2.1. The contractor shall combine theoretical modeling and advanced algorithm development to produce 1-/2-/3-dimensional physics-based computationally efficient codes that are capable of taking advantage of computer hardware advances such as multi-core processors, graphics processing units, and high performance computing systems.

4.2.2. The contractor shall combine theoretical modeling and advanced algorithm development to produce Particle-In-Cell (PIC) codes that are capable of taking advantage of computer hardware advances such as multi-core processors, graphics processing units, and high performance computing systems.

4.2.3. The Contractor shall develop a designer-friendly computational network under which the newly developed codes and existing NRL codes will be integrated with beam optics codes and commercial 3D electromagnetic codes to support rapid prototyping of VE devices and high power RF sources.

4.2.4. The Contractor shall implement the optimization algorithms developed in Task 4.1.3 to be suitable for operation together with the NRL CHRISTINE, NRL TESLA, and NRL NEPTUNE codes.

4.2.5. The Contractor shall validate new algorithms and codes by comparison with experimental data and/or with existing models and codes. The Contractor shall implement the optimization algorithms developed in Task 4.1.3 to be suitable for operation together with the NRL CHRISTINE, NRL TESLA, and NRL NEPTUNE codes.

4.2.6. The contractor shall perform the design, development and maintenance of ancillary software tools to support the design process for vacuum electronics device research. These include pre- and post-processing tools, and graphical user interfaces to support the physics-based design tools and simulation management, that contribute to the overall analysis environment.

4.2.7. The contractor shall work with NRL personnel to maintain and extend existing codes and t7o provide training and support to code users.

4.3 Task 3: Vacuum Electronics Design

4.3.1. The contractor shall create designs of VE devices and HPM sources to meet DoD mission needs. The design process shall include – as appropriate – thermal, mechanical, electromagnetic analyses, and optimization with respect to multiple factors.

4.3.2. The Contractor shall create designs of electron optics components needed for NRL VE devices. The electron optics components include electron guns, beam sticks, electron beam collectors, and electron beam transport systems. The electron optics design shall be completed by using MICHELLE code or other well-validated electron optics design codes.

4.3.3. The Contractor shall create designs of radio-frequency (RF) passive components needed for VE devices and HPM sources to meet DoD mission needs. The passive components include filters, combiners, de-multiplexers, couplers, transitions, antennas and antenna feeds, quasi-optical components, and control components such as phase shifters.

4.4 Task 4: Application of Stability and Tolerance Analysis Algorithms for Optimization of VE devices

4.4.1. The Contractor shall evaluate the relative merits of selected optimization algorithms developed under Task 4.1.3 and implemented under Task 4.2.4 for application to vacuum electronic devices with operating parameters to be determined in consultation with NRL.

Algorithms shall be evaluated for their speed and their success in finding optimum design points including the ability to predict the sensitivity of the point design to manufacturing and material tolerances.

4.4.2. The Contractor shall establish a methodology for evaluation of onset of spurious oscillations in VE devices with operating parameters to be determined in consultation with NRL. The stability analysis shall be completed on the base of the algorithms developed under Task 4.1.4 and the NRL codes (CHRISTINE, TESLA and Neptune).

4.5 Task 5: Fabrication, Test, and Evaluation of VE devices

4.5.1. The Contractor shall perform fabrication and assembly of parts and apparatus to support experiments related to microwave, millimeter-wave, and sub-millimeter-wave vacuum electron devices and electron sources.

4.5.2. The Contractor shall perform experimental test and evaluation of prototype vacuum electron devices, electron beam systems, and RF sources covering the frequency range from microwave to sub-millimeter-wave. The Contractor shall perform assembly, test, and evaluation of systems incorporating these vacuum electron devices and RF sources.

4.5.3. The Contractor shall collect and analyze experimental data, and compare it to simulation results.

5.0 SECURITY

All work will be at the UNCLASSIFIED level.

6.0 TRAVEL

During the performance of this task order, local, CONUS, and OCONUS travel costing up to $12,600.00 per annum may be required.

6.1. Travel / Temporary Duty (TDY): Travel to other government facilities or contractor facilities may be required to attend government meetings, reviews, or symposia. Attendance at scientific conferences will be required.

6.2. The Contractor shall submit all travel requirements (including plans, agendas, itineraries, and dates) for pre-approval to the Government. Approved travel will be on a strictly cost reimbursable basis.

7.0 MATERIALS, SERVICES AND EQUIPMENT

Equipment DOES NOT include government furnished property.

8.0 LEVEL OF EFFORT (YEAR 1)

Labor Category Hours (Annually) Senior Researcher/Program Manager

Senior Researcher i 416 Senior Researcher ii 312 Researcher i 832

Researcher ii 832 Researcher iii 1750 Program Financial Control 52 Project Manager 52 Contract Manager 52 Total 4818

9.0 DELIVERABLES

CDRL Data Item Frequency A001 Contractor Labor Report Monthly A002 Financial Status Report Monthly A003 Technical and Data Analysis, Reports, Procedures, And Presentation Materials, including software and hardware developed herein

ASREQ

10.0 PERIOD OF PERFORMANCE

36 months after contract award.

11.0 PREFERRED ORDER TYPE

Cost Plus Fixed Fee Term.