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1. Flexure based fibre positioners: design optimisation to follow arbitrary focal plane curvature

Author

Louth, Tom, Watson, Stephen, and Montgomery, David

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract

The use of flexures to achieve fibre positioner motion is being actively investigated by several institutes, for example at the UK Astronomy Technology Centre (UKATC) and Leibniz-Institute for Astrophysics Potsdam. One challenge when designing with flexures is the large number of degrees of freedom available which makes it difficult or impossible to optimise their motion by hand. In this paper we demonstrate two approaches for optimising flexure geometry to follow arbitrary focal surface curvature and to orient the optical fibre with arbitrary tilt. These approaches are: analytical using MATLAB models and FEA based using Ansys. The approaches are complementary allowing the designer to efficiently explore the parameter space and then do precise optimisation of the flexure geometry. We demonstrate the applicability both to the UKATCs preferred design for WST, and to flexure-based fibre positioner designs generally. We also present a sensitivity analysis relating small changes in design parameters to changes in fibre tip motion. Finally we briefly present the UKATCs preferred geometry for the WST fibre positioner., Comment: 17 pages, 13 figures, submitted to SPIE Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, Tokyo, 16-21/06/2024

Published
2024

2. WST -- Widefield Spectroscopic Telescope: addressing the instrumentation challenges of a new 12m class telescope dedicated to widefield Multi-object and Integral Field Spectroscopy

Author

Lee, David, Vernet, Joel D. R., Bacon, Roland, Jeanneau, Alexandre, Oliva, Ernesto, Brucalassi, Anna, Tozzi, Andrea, Araiza-Durán, José A., Bianco, Andrea, Kragt, Jan, Navarro, Ramon, Garilli, Bianca, Dohlen, Kjetil, Kneib, Jean-Paul, Araujo, Ricardo, Rombach, Maxime, Hernandez, Eloy, de Jong, Roelof S., Kelz, Andreas, Watson, Stephen, Louth, Tom, Bryson, Ian, George, Elizabeth, Hubin, Norbert, Bryant, Julia, and Lawrence, Jon

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

WST - Widefield Spectroscopic Telescope: We summarise the design challenges of instrumentation for a proposed 12m class Telescope that aims to provide a large (>2.5 square degree) field of view and enable simultaneous Multi-object (> 20,000 objects) and Integral Field spectroscopy (inner 3x3 arcminutes field of view), initially at visible wavelengths. For the MOS mode, instrumentation includes the fiber positioning units, fiber runs and the high (R~40,000) and low (R~3,000 - 4,000) resolution spectrographs. For the MUSE like Integral Field Spectrograph, this includes the relay from the Telescope Focal Plane, the multi-stage splitting and slicing and almost 150 identical spectrographs. We highlight the challenge of mass production at a credible cost and the issues of maintenance and sustainable operation., Comment: 9 pages, 9 figures

Published
2024

3. HRMOS White Paper: Science Motivation

Author

Magrini, Laura, Bensby, Thomas, Brucalassi, Anna, Randich, Sofia, Jeffries, Robin, de Silva, Gayandhi, Skuladottir, Asa, Smiljanic, Rodolfo, Gonzalez, Oscar, Hill, Vanessa, Lagarde, Nadege, Tolstoy, Eline, Arroyo-Polonio, Jose' Maria, Baratella, Martina, Barnes, John R., Battaglia, Giuseppina, Baumgardt, Holger, Bellazzini, Michele, Biazzo, Katia, Bragaglia, Angela, Carter, Bradley, Casali, Giada, Cescutti, Gabriele, Danielski, Camilla, Mena, Elisa Delgado, Drazdauskas, Arnas, Gieles, Mark, Giribaldi, Riano, Hawkins, Keith, Hoeijmakers, H. Jens, Jablonka, Pascale, Kamath, Devika, Louth, Tom, Marino, Anna Fabiola, Martell, Sarah, Merle, Thibault, Montet, Benjamin, Murphy, Michael T., Nisini, Brunella, Nordlander, Thomas, D'Orazi, Valentina, Pino, Lorenzo, Romano, Donatella, Sacco, Germano, Sandford, Nathan R., Sollima, Antonio, Spina, Lorenzo, Tautvaivsiene, Grazina, Ting, Yuan-Sen, Tozzi, Andrea, Van der Swaelmen, Mathieu, Van Eck, Sophie, Watson, Stephen, Worley, C. Clare, and Zocchi, Alice

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract

The High-Resolution Multi-Object Spectrograph (HRMOS) is a facility instrument that we plan to propose for the Very Large Telescope (VLT) of the European Southern Observatory (ESO), following the initial presentation at the VLT 2030 workshop held at ESO in June 2019. HRMOS provides a combination of capabilities that are essential to carry out breakthrough science across a broad range of active research areas from stellar astrophysics and exoplanet studies to Galactic and Local Group archaeology. HRMOS fills a gap in capabilities amongst the landscape of future instrumentation planned for the next decade. The key characteristics of HRMOS will be high spectral resolution (R = 60000 - 80000) combined with multi-object (20-100) capabilities and long term stability that will provide excellent radial velocity precision and accuracy (10m/s). Initial designs predict that a SNR~100 will be achievable in about one hour for a star with mag(AB) = 15, while with the same exposure time a SNR~ 30 will be reached for a star with mag(AB) = 17. The combination of high resolution and multiplexing with wavelength coverage extending to relatively blue wavelengths (down to 380\,nm), makes HRMOS a spectrograph that will push the boundaries of our knowledge and that is envisioned as a workhorse instrument in the future. The science cases presented in this White Paper include topics and ideas developed by the Core Science Team with the contributions from the astronomical community, also through the wide participation in the first HRMOS Workshop (https://indico.ict.inaf.it/event/1547/) that took place in Firenze (Italy) in October 2021., Comment: 88 pages, 39 figures. Comments and expressions of interest are welcome by contacting members of the Core Science Team

Published
2023

4. WST: Widefield Spectroscopic Telescope: addressing the instrumentation challenges of a new 12m class telescope dedicated to widefield multi-object and integral field spectroscopy

Author

Bryant, Julia J., Motohara, Kentaro, Vernet, Joël R. D., Lee, David, Vernet, Joël D. R., Bacon, Roland, Jeanneau, Alexandre, Oliva, Ernesto, Brucalassi, Anna, Tozzi, Andrea, Araiza-Durán, José A., Bianco, Andrea, Kragt, Jan, Navarro, Ramon, Garilli, Bianca, Dohlen, Kjetil, Kneib, Jean-Paul, Araujo, Ricardo, Rombach, Maxime, Hernandez, Eloy, de Jong, Roelof S., Kelz, Andreas, Watson, Stephen, Louth, Tom, Bryson, Ian, George, Elizabeth, Hubin, Norbert, Bryant, Julia, and Lawrence, Jon

Published
2024
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6. HARMONI: first light spectroscopy for the ELT: instrument final design and quantitative performance predictions

Author

Thatte, Niranjan, primary, Bryson, Ian, additional, Clarke, Fraser, additional, Ferraro-Wood, Vanessa, additional, Fusco, Thierry, additional, Le Mignant, David, additional, Melotte, Dave J., additional, Neichel, Benoit, additional, Schnetler, Hermine, additional, Tecza, Matthias, additional, Arribas, Santiago, additional, Crespo, Alejandro, additional, Estrada Piqueras, Alberto, additional, García García, Miriam, additional, Pereira Santaella, Miguel, additional, Piqueras López, Javier, additional, Blaizot, Jeremy, additional, Bouché, Nicholas, additional, Boudon, Didier, additional, Chapuis, Diane, additional, Daguise, Eric, additional, Disseau, Karen, additional, Guibert, Mtthieu, additional, Jarno, Aurelien, additional, Jeanneau, Alexandre, additional, Laurent, Florence, additional, Loupias, Magali, additional, Migniau, Jean-Emmanuel, additional, Piqueras, Laure, additional, Remillieux, Alban, additional, Richard, Johan, additional, Pécontal-Rousset, Arlette, additional, Bardou, Lisa, additional, Close, Madeline M., additional, Deshmukh, Rishi, additional, Dimoudi, Sofia, additional, Dubbledam, Marc, additional, King, David, additional, Morris, Simon, additional, Morris, Timothy J., additional, O'Brien, Kieran S., additional, Staykov, Lazar, additional, Swinbank, Mark, additional, Townson, Matthew, additional, Younger, Eddy, additional, Accardo, Matteo, additional, Avarez Mendez, Domingo, additional, Conzelmann, Ralf, additional, Egner, Sebastian, additional, George, Elizabeth M., additional, Gonté, Frederic, additional, Hopgood, Joshua, additional, Ives, Derek, additional, Mehrgan, Leander, additional, Mueller, Eric, additional, Peroux, Celine, additional, Vernet, Joel, additional, Alonso-Sánchez, Ángel, additional, Giuseppina, Battaglia, additional, Cagigas, Miguel, additional, Delgado, Jose Miguel, additional, Fernandez Izquierdo, Patricia, additional, Fragoso López, Ana Belén, additional, García-Lorenzo, Maria Begoña, additional, Hernandez Suarez, Elvio, additional, Herreros Linares, José Miguel, additional, Joven, Enrique, additional, López, Roberto, additional, Martín Hernando, Yolanda, additional, Mediavilla, Evencio, additional, Monreal, Ana, additional, Peñate Castro, José, additional, Rasilla, Jose Luis, additional, Rebolo, Rafael, additional, Rodríguez-Ramos, Luis Fernando, additional, Vega Moreno, Afrodisio, additional, Viera, Teodora, additional, Carlotti, Alexis, additional, Correia, Jean-Jacques, additional, Delboulbe, Alain, additional, Guieu, Sylvain, additional, Hours, Adrien, additional, Hubert, Zoltan, additional, Jocou, Laurent, additional, Magnard, Yves, additional, Moulin, Thibaut, additional, Pancher, Fabrice, additional, Rabou, Patrick, additional, Stadler, Eric, additional, Contini, Thierry, additional, Larrieu, Marie, additional, Fantei-Caujolle, Yan, additional, Lecron, Daniel, additional, Rousseau, Sylvain, additional, Beltramo-Martin, Olivier, additional, Bon, William, additional, Bonnefoi, Anne, additional, Ceria, William, additional, Choquet, Elodie, additional, Correia, Carlos, additional, Costille, Anne, additional, Dohlen, Kjetil, additional, Ducret, Franck, additional, El Hadi, Kacem, additional, Epinat, Benoit, additional, Fetick, Romain, additional, Gach, Jean-Luc, additional, Groussin, Oliver, additional, Jaafar, Issa, additional, Le Merrer, Joel, additional, Llored, Marc, additional, Pedreros, Felipe, additional, Renault, Edgard, additional, Sanchez, Patrice, additional, Vigan, Arthur, additional, Vola, Pascal, additional, Lim, Caroline, additional, Vedrenne, Nicola, additional, Petit, Cyril, additional, Sauvage, Jean-Francois, additional, Bagci, Taha, additional, Cann, Nick, additional, Chao Ortiz, Jorge, additional, Elliott, Ellis, additional, Seitis, Tea, additional, Tosh, Ian, additional, Anderson, Josh, additional, Black, Martin, additional, Bond, Charlotte, additional, Born, Andy J., additional, Campbell, Kenny, additional, Campbell, Neil, additional, Carruthers, James, additional, Cochrane, William, additional, Dobson, Naomi, additional, Evans, Chris J., additional, Gallie, Angus, additional, Gonzalez, Oscar, additional, Harman, Joel, additional, Henry, David M., additional, Humphreys, William, additional, Louth, Tom, additional, Miller, Chris, additional, Montgomery, David M., additional, Murray, John, additional, O'Malley, Norman, additional, Ritchie, Lynn, additional, Sanchez-Janssen, Ruben, additional, Schwartz, Noah, additional, Smith, Patrick, additional, Watt, Stuart, additional, Wells, Martyn, additional, Wilson, Sandi, additional, Gultekin, Kayhan K., additional, Mateo, Mario L., additional, Meyer, Michael, additional, Valluri, Monica, additional, Ahmad, Munadi, additional, Booth, Michael, additional, Capone, John I., additional, Cappellari, Michele, additional, Gooding, David, additional, Grisdale, Kearn, additional, Hidalgo, Andrea, additional, Kariuki, James, additional, Lewis, Ian, additional, Lowe, Adam, additional, Lynn, Jim, additional, Menduina, Alvaro, additional, Ozer, Zeynep, additional, Preece, Roy, additional, Rigopoulou, Dimitra, additional, Rodrigues, Myriam, additional, and Routledge, Laurence, additional

Published
2020
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7. HARMONI at ELT: project status and instrument overview

Author

Bryant, Julia J., Motohara, Kentaro, Vernet, Joël R. D., Thatte, Niranjan A., Melotte, Dave, Neichel, Benoit, Le Mignant, David, Rees, Phil, Clarke, Fraser, Ferraro-Wood, Vanessa, Gonzalez, Oscar, Jones, Maia, Álvarez Urueña, Alonso, Argelaguet Vilaseca, Heribert, Arribas Mocoroa, Santiago, Caballero, José Antonio, Carracedo Carballal, Gonzalo José, Estrada Piqueras, Alberto, Ferro, Irene, García García, Miriam, Lamperti, Isabella, Pereira Santaella, Miguel, Perna, Michele, Piqueras Lopez, Javier, Bouché, Nicolas, Boudon, Didier, Daguise, Eric, Domenis, Nicola, Fensch, Jérémy, Olivier Flasseur, Olivier, Giroud, Rémi, Guibert, Matthieu, Jarno, Aurelien, Jeanneau, Alexandre, Krogager, Jens-Kristian, Langlois, Maud, Laurent, Florence, Loupias, Magali, Migniau, Jean-Emmanuel, Nguyen, Dieu, Piqueras, Laure, Remillieux, Alban, Richard, Johan, Pecontal, Arlette, Bardou, Lisa, Barr, David, Cetre, Sylvain, Dimoudi, Sofia, Dubbeldam, Marc, Dunn, Andrew, Gadotti, Dimitri, Guy, Joss, King, David, McLeod, Anna, Morris, Simon, Morris, Tim, O'Brien, Kieran, Ronson, Emily, Smith, Russell, Staykov, Lazar, Swinbank, Mark, Accardo, Matteo, Alvarez Mendez, Domingo, Fuerte Rodriguez, Pablo Alberto, George, Elizabeth, Ives, Derek, Mehrgan, Leander, Mueller, Eric, Reyes, Javier, Conzelmann, Ralf, Gutierrez Cheetham, Pablo, Alonso Sanchez, Angel, Battaglia, Giuseppina, Cagigas, Miguel, Castro-Almazán, Julio A., Chulani, Haresh, Delgado-García, Graciela, Fernandez Izquierdo, Patricia, Esparza-Arredondo, Donaji, García-Lorenzo, Begoña, Hernández González, Alberto, Hernández Suárez, Elvio, Licandro, Javier, Joven, Enrique, López López, Roberto, Lujan Gonzalez, Alejandro Antonio, Martín Hernando, Yolanda, Martín-Navarro, Ignacio, Mediavilla, Evencio, Menéndez Mendoza, Saúl, Montoya Martínez, Luz Maria, Peñate Castro, José, Murgas, Felipe, Pallé, Enric, Pérez, Álvaro, Rasilla, Jose Luis, Rebolo, Rafael, Rodríguez, Horacio, Rodríguez Ramos, Luis Fernando, Sánchez Béjar, Victor, Shahbaz, Tariq, Vega Moreno, Afrodisio, Viera, Teodora, Bonnefoy, Mickaël, Bret, Tony, Carlotti, Alexis, Correia, Jean-Jacques, Curaba, Stéphane, Delboulbé, Alain, Guieu, Sylvain, Hours, Adrien, Hubert, Zoltan, Jocou, Laurent, Magnard, Yves, Michaud, Laurence, Moulin, Thibaut, Pancher, Fabrice, Rabou, Patrick, Rochat, Sylvain, Stadler, Eric, Contini, Thierry, Larrieu, Marie, Mamessier, Sébastien, Boebion, Olivier, Fantei-Caujolle, Yan, Lecron, Daniel, Amram, Philippe, Blanchard, Patrick, Bon, William, Bonnefoi, Anne, Bozier, Alexandre, Ceria, William, Challita, Zalpha, Charles, Yannick, Choquet, Elodie, Costille, Anne, Delsanti, Audrey, Dohlen, Kjetil, Ducret, Franck, El Hadi, Kacem, Foulon, Benjamin, Gimenez, Jean-Luc, Groussin, Olivier, Jaquet, Marc, Renault, Edgard, Rouquette, Paul, Sanchez, Patrice, Vigan, Arthur, Zavagno, Annie, Fétick, Romain, Fusco, Thierry, Héritier, Cedric, Sauvage, Jean-Francois, Vedrenne, Nicolas, Aksoy, Demet, Caldwell, Martin, Fitzpatrick, Ann, Geddert, Carl, Hiscock, Peter, Johnson, Emma, Nalagatla, Murali, Saraff, Louise, Shreeves, Joe, Tildesley, Matthew, Wells, Mark, Aretos, Anastasios, Barrett, Lee, Black, Martin, Bond, Charlotte, Brierley, Saskia, Bryson, Ian, Calderhead, Amelia, Campbell, Kenny, Carruthers, James, Chapman, Lee, Cochrane, William, Gillespie, Rory, Harman, Joel, Harvey, Douglas, Harvey, Eamonn, Johnson, Bethany, Louth, Tom, MacIntosh, Mike, MacIver, Anna, Miller, Chris, Montgomery, David, Murali, Meenu, Murray, John, O'Malley, Norman, Sanchez-Janssen, Ruben, Schwartz, Noah, Smith, Patrick, Strachan, Jonathan, Todd, Stephen, Wasley, Dawn, Wilson, Sandi, Zhou, Junyi, Bell, Eric, Gnedin, Oleg, Gultekin, Kayhan, Mateo, Mario, Meyer, Michael, Birkby, Jayne, Boland, Liam, Cappellari, Michele, Castillo Dominguez, Edgar, Gooding, David, Grisdale, Kearn, Hidalgo, Andrea, Kariuki, James, Lewis, Ian, McCall, Kieran, Meyer, R. Elliot, Muslimov, Eduard, Lowe, Adam, Ozer, Zeynep, Paszynska, Sophie, Rigopoulou, Dimitra, Tecza, Matthias, and York, Alec

Published
2024
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