WORK PLAN

UFC-P5 is responsible for the global management of the project and is the interface with the Commission for both managerial and technical aspects. The overall structure of the project management and its several boards are shown in the following tables.

The work to be performed is organised in 9 work packages planned over a period of 3-years and a half, as shown in the following figure :

Workplan MAC-TFC
Phase 1: definition of specifications, system design and physics of the atomic clock,
Phase 2: development of individual technologies and building blocks,
Phase 3: packaging of the atomic resonator,
Phase 4: assembly and experimental validation of the MEMS clock as well as exploitation and dissemination items.



Work package list and role
WP0 : Project coordination and management
The objective is to coordinate and supervise the successful running of project MAC‑TFC as well as to take corrective actions and resolve conflicts if necessary.
To match this objective an appropriate management structure is proposed. Regular project meetings will be organized with a periodicity of 6 month to follow the progress of the project and implement eventual adjustments of the work plan.
MEMS Atomic Clocks for Timing, Frequency control and Communications
WP1 : Specifications and system design
This workpackage will get the specifications on the technologies to be developed, the design of physics package, electronic servo system as well integration issues and testing strategy for the proposed prototype of MEMS atomic clock.

WP2 : Physics of atomic resonator
It monitors the coherence of atomic resonator, guarantying the high performances in implementing the MEMS atomic clock. This task will permit the optimized operation of a modular experimental clock having all the critical components and a compact physics package.

WP3 : Technology and filling of microcell
The objective is the implementation, optimisation and testing of micro-cells in two different configurations (transmissive T-cell, reflective R-cell and in line I-cell) including the optimisation of technological process using solid-state Cs dispenser and MEMS getter. This contains the micromachining technology of micro-cells as well as the development of specific printable Cs dispensers and the adaptation of MEMS getter technique and implementation of alkali vapour activation methods.

WP4 : Optimised VCSEL technology and microoptical components
The objective is firstly the design, fabrication and delivery of specially adapted 894 nm VCSELs for incorporation into MEMS atomic clock demonstrator systems and secondly the manufacturing of micro-optical components for laser beam forming.

WP5 : Electronics
It is dedicated to develop all the electronics required to operate a laser-based atomic clock, while demonstrating very low power consumption and high level of integration. This includes the generation of the RF 4.6 GHz signal with a local oscillator, its buffering and DC biasing for driving the VCSEL, the cavity signal readout and processing, and the regulation loops for cavity frequency regulation, laser stabilization and cavity temperature regulation, The system will be cleverly partitioned into sub-systems for modular use with the other components during the project.

WP6 : Packaging
WP6 aims to integrate the building blocks of the physics package (MEMS-cell, VCSEL, detector, heating and temperature sensor) using LTCC technology.

WP7 : Assembly and test of clock demonstrator
The goal of this work package is to assemble and test the miniature clock prototype formed by the LTCC-package produced during WP6 and the electronics realised in the frame of WP5. Here, we will also evaluate the reliability of the CSAC oscillator at “component level”, and the accessible performance of a clock construction based on such CSAC oscillator. Complementary tests of the modular experimental clock (output of WP2) will also be performed for comparison as well as some selected tests of key components that were not available in previous phases (such as optimised 894nm laser sources).

WP8 : Exploitation and dissemination
This WP is implemented to guarantee the effective dissemination and use of the achievements and to promote the applications of MAC-TFC atomic clock. It consists of 3 parts: publication of detailed project items study aiming at commercial impacts of the project and the transfer of selected technologies from development/prototype status towards production status.
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