Calendar

Week Monday Tuesday Wednesday Thursday Friday
1/15
First class meeting 4:00p - 5:50p ECEB 1002
1/22
Second class meeting 4:00p - 5:50p ECEB 1002
CAD assignment due 11:59p
1/29
Add/Drop Deadline due 11:59p
Third class meeting 4:00p - 5:50p ECEB 1002
Project approval due 11:59p
2/5
First team meetings with TAs 4:00p ECEB 2015/3015
Proposals due 11:59p
Initial Conversation With Machine Shop (required if using the shop) due 4:00p ECEB 1047
Team Contract due 11:59p
2/12
2/19
Design Document due 11:59p
Proposal Regrade due 11:59p
2/26
Design Review 8:00a - 6:00p With Instructor and TAs
Design Review
Fliflet: ECEB 2070
Design Review
Schuh: ECEB 2072
Design Review
Gruev: ECEB 2074
Design Review 8:00a - 4:00p With Instructor and TAs
Design Review
Fliflet: ECEB 2070
Design Review
Schuh: ECEB 2072
Design Review
Gruev: ECEB 2074
Design Review 8:00a With Instructor and TAs
Design Review
Fliflet: ECEB 2070
Design Review
Schuh: ECEB 2072
Design Review
Gruev: ECEB 2074
PCB Review 3:00p - 5:00p ECEB 3081
3/4
Last day for revisions to the machine shop due ECEB 1048
3/11
Spring Break
Spring Break
Spring Break
Spring Break
Spring Break
3/18
3/25
4/1
4/8
4/15
Mock demo During weekly TA mtg
Mock demo During weekly TA mtg
Mock demo During weekly TA mtg
Mock demo During weekly TA mtg
Mock demo During weekly TA mtg
4/22
Final Demo With Instructor and TAs
Final Demo With Instructor and TAs
Final Demo With Instructor and TAs
Mock Presentation With Comm and ECE TAs
Mock Presentation With Comm and ECE TAs
4/29
Final Presentation With instructor and TAs
Final Presentation With Instructor and TAs
Final papers due 11:59p
Lab checkout 3:00p - 4:30p With TA
Award Ceremony 4:30p - 5:30p ECEB 3002
Lab Notebook Due due 11:59p

Resonant Cavity Field Profiler

Salaj Ganesh, Max Goin, Furkan Yazici

Resonant Cavity Field Profiler

Featured Project

# Team Members:

- Max Goin (jgoin2)

- Furkan Yazici (fyazici2)

- Salaj Ganesh (salajg2)

# Problem

We are interested in completing the project proposal submitted by Starfire for designing a device to tune Resonant Cavity Particle Accelerators. We are working with Tom Houlahan, the engineer responsible for the project, and have met with him to discuss the project already.

Resonant Cavity Particle Accelerators require fine control and characterization of their electric field to function correctly. This can be accomplished by pulling a metal bead through the cavities displacing empty volume occupied by the field, resulting in measurable changes to its operation. This is typically done manually, which is very time-consuming (can take up to 2 days).

# Solution

We intend on massively speeding up this process by designing an apparatus to automate the process using a microcontroller and stepper motor driver. This device will move the bead through all 4 cavities of the accelerator while simultaneously making measurements to estimate the current field conditions in response to the bead. This will help technicians properly tune the cavities to obtain optimum performance.

# Solution Components

## MCU:

STM32Fxxx (depending on availability)

Supplies drive signals to a stepper motor to step the metal bead through the 4 quadrants of the RF cavity. Controls a front panel to indicate the current state of the system. Communicates to an external computer to allow the user to set operating conditions and to log position and field intensity data for further analysis.

An MCU with a decent onboard ADC and DAC would be preferred to keep design complexity minimum. Otherwise, high MIPS performance isn’t critical.

## Frequency-Lock Circuitry:

Maintains a drive frequency that is equal to the resonant frequency. A series of op-amps will filter and form a control loop from output signals from the RF front end before sampling by the ADCs. 2 Op-Amps will be required for this task with no specific performance requirements.

## AC/DC Conversion & Regulation:

Takes an AC voltage(120V, 60Hz) from the wall and supplies a stable DC voltage to power MCU and motor driver. Ripple output must meet minimum specifications as stated in the selected MCU datasheet.

## Stepper Drive:

IC to control a stepper motor. There are many options available, for example, a Trinamic TMC2100. Any stepper driver with a decent resolution will work just fine. The stepper motor will not experience large loading, so the part choice can be very flexible.

## ADC/DAC:

Samples feedback signals from the RF front end and outputs the digital signal to MCU. This component may also be built into the MCU.

## Front Panel Indicator:

Displays the system's current state, most likely a couple of LEDs indicating progress/completion of tuning.

## USB Interface:

Establishes communication between the MCU and computer. This component may also be built into the MCU.

## Software:

Logs the data gathered by the MCU for future use over the USB connection. The position of the metal ball and phase shift will be recorded for analysis.

## Test Bed:

We will have a small (~ 1 foot) proof of concept accelerator for the purposes of testing. It will be supplied by Starfire with the required hardware for testing. This can be left in the lab for us to use as needed. The final demonstration will be with a full-size accelerator.

# Criterion For Success:

- Demonstrate successful field characterization within the resonant cavities on a full-sized accelerator.

- Data will be logged on a PC for later use.

- Characterization completion will be faster than current methods.

- The device would not need any input from an operator until completion.

Project Videos