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1. Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph

Author

Sugai, Hajime, Tamura, Naoyuki, Karoji, Hiroshi, Shimono, Atsushi, Takato, Naruhisa, Kimura, Masahiko, Ohyama, Youichi, Ueda, Akitoshi, Aghazarian, Hrand, de Arruda, Marcio Vital, Barkhouser, Robert H., Bennett, Charles L., Bickerton, Steve, Bozier, Alexandre, Braun, David F., Bui, Khanh, Capocasale, Christopher M., Carr, Michael A., Castilho, Bruno, Chang, Yin-Chang, Chen, Hsin-Yo, Chou, Richard C. Y., Dawson, Olivia R., Dekany, Richard G., Ek, Eric M., Ellis, Richard S., English, Robin J., Ferrand, Didier, Ferreira, Décio, Fisher, Charles D., Golebiowski, Mirek, Gunn, James E., Hart, Murdock, Heckman, Timothy M., Ho, Paul T. P., Hope, Stephen, Hovland, Larry E., Hsu, Shu-Fu, Hu, Yen-Shan, Huang, Pin Jie, Jaquet, Marc, Karr, Jennifer E., Kempenaar, Jason G., King, Matthew E., Fèvre, Olivier Le, Mignant, David Le, Ling, Hung-Hsu, Loomis, Craig, Lupton, Robert H., Madec, Fabrice, Mao, Peter, Marrara, Lucas Souza, Ménard, Brice, Morantz, Chaz, Murayama, Hitoshi, Murray, Graham J., de Oliveira, Antonio Cesar, de Oliveira, Claudia Mendes, de Oliveira, Ligia Souza, Orndorff, Joe D., Vilaça, Rodrigo de Paiva, Partos, Eamon J., Pascal, Sandrine, Pegot-Ogier, Thomas, Reiley, Daniel J., Riddle, Reed, Santos, Leandro, Santos, Jesulino Bispo dos, Schwochert, Mark A., Seiffert, Michael D., Smee, Stephen A., Smith, Roger M., Steinkraus, Ronald E., Sodré Jr, Laerte, Spergel, David N., Surace, Christian, Tresse, Laurence, Vidal, Clément, Vives, Sebastien, Wang, Shiang-Yu, Wen, Chih-Yi, Wu, Amy C., Wyse, Rosie, and Yan, Chi-Hung

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Prime Focus Spectrograph (PFS) is an optical/near-infrared multifiber spectrograph with 2394 science fibers distributed across a 1.3-deg diameter field of view at the Subaru 8.2-m telescope. The wide wavelength coverage from 0.38 {\mu}m to 1.26 {\mu}m, with a resolving power of 3000, simultaneously strengthens its ability to target three main survey programs: cosmology, galactic archaeology and galaxy/AGN evolution. A medium resolution mode with a resolving power of 5000 for 0.71 {\mu}m to 0.89 {\mu}m will also be available by simply exchanging dispersers. We highlight some of the technological aspects of the design. To transform the telescope focal ratio, a broad-band coated microlens is glued to each fiber tip. A higher transmission fiber is selected for the longest part of the cable system, optimizing overall throughput; a fiber with low focal ratio degradation is selected for the fiber-positioner and fiber-slit components, minimizing the effects of fiber movements and fiber bending. Fiber positioning will be performed by a positioner consisting of two stages of piezo-electric rotary motors. The positions of these motors are measured by taking an image of artificially back-illuminated fibers with the metrology camera located in the Cassegrain container; the fibers are placed in the proper location by iteratively measuring and then adjusting the positions of the motors. Target light reaches one of the four identical fast-Schmidt spectrograph modules, each with three arms. The PFS project has passed several project-wide design reviews and is now in the construction phase., Comment: 19 pages, 11 figures

Published
2015
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2. Progress with the Prime Focus Spectrograph for the Subaru Telescope: a massively multiplexed optical and near-infrared fiber spectrograph

Author

Sugai, Hajime, Tamura, Naoyuki, Karoji, Hiroshi, Shimono, Atsushi, Takato, Naruhisa, Kimura, Masahiko, Ohyama, Youichi, Ueda, Akitoshi, Aghazarian, Hrand, de Arruda, Marcio Vital, Barkhouser, Robert H., Bennett, Charles L., Bickerton, Steve, Bozier, Alexandre, Braun, David F., Bui, Khanh, Capocasale, Christopher M., Carr, Michael A., Castilho, Bruno, Chang, Yin-Chang, Chen, Hsin-Yo, Chou, Richard C. Y., Dawson, Olivia R., Dekany, Richard G., Ek, Eric M., Ellis, Richard S., English, Robin J., Ferrand, Didier, Ferreira, Décio, Fisher, Charles D., Golebiowski, Mirek, Gunn, James E., Hart, Murdock, Heckman, Timothy M., Ho, Paul T. P., Hope, Stephen, Hovland, Larry E., Hsuc, Shu-Fu, Hu, Yen-Shan, Huang, Pin Jie, Jaquet, Marc, Karr, Jennifer E., Kempenaar, Jason G., King, Matthew E., Fèvre, Olivier Le, Mignant, David Le, Ling, Hung-Hsu, Loomis, Craig, Lupton, Robert H., Madec, Fabrice, Mao, Peter, Marrara, Lucas Souza, Ménard, Brice, Morantz, Chaz, Murayama, Hitoshi, Murray, Graham J., de Oliveira, Antonio Cesar, de Oliveira, Claudia Mendes, de Oliveira, Ligia Souza, Orndorff, Joe D., Vilaça, Rodrigo de Paiva, Partos, Eamon J., Pascal, Sandrine, Pegot-Ogier, Thomas, Reiley, Daniel J., Riddle, Reed, Santos, Leandro, Santos, Jesulino Bispo dos, Schwochert, Mark A., Seiffert, Michael D., Smee, Stephen A., Smith, Roger M., Steinkraus, Ronald E., Sodré Jr, Laerte, Spergel, David N., Surace, Christian, Tresse, Laurence, Vidal, Clément, Vives, Sebastien, Wang, Shiang-Yu, Wen, Chih-Yi, Wu, Amy C., Wyse, Rosie, and Yan, Chi-Hung

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Prime Focus Spectrograph (PFS) is an optical/near-infrared multi-fiber spectrograph with 2394 science fibers, which are distributed in 1.3 degree diameter field of view at Subaru 8.2-meter telescope. The simultaneous wide wavelength coverage from 0.38 um to 1.26 um, with the resolving power of 3000, strengthens its ability to target three main survey programs: cosmology, Galactic archaeology, and galaxy/AGN evolution. A medium resolution mode with resolving power of 5000 for 0.71 um to 0.89 um also will be available by simply exchanging dispersers. PFS takes the role for the spectroscopic part of the Subaru Measurement of Images and Redshifts project, while Hyper Suprime-Cam works on the imaging part. To transform the telescope plus WFC focal ratio, a 3-mm thick broad-band coated glass-molded microlens is glued to each fiber tip. A higher transmission fiber is selected for the longest part of cable system, while one with a better FRD performance is selected for the fiber-positioner and fiber-slit components, given the more frequent fiber movements and tightly curved structure. Each Fiber positioner consists of two stages of piezo-electric rotary motors. Its engineering model has been produced and tested. Fiber positioning will be performed iteratively by taking an image of artificially back-illuminated fibers with the Metrology camera located in the Cassegrain container. The camera is carefully designed so that fiber position measurements are unaffected by small amounts of high special-frequency inaccuracies in WFC lens surface shapes. Target light carried through the fiber system reaches one of four identical fast-Schmidt spectrograph modules, each with three arms. Prototype VPH gratings have been optically tested. CCD production is complete, with standard fully-depleted CCDs for red arms and more-challenging thinner fully-depleted CCDs with blue-optimized coating for blue arms., Comment: 14 pages, 12 figures, submitted to "Ground-based and Airborne Instrumentation for Astronomy V, Suzanne K. Ramsay, Ian S. McLean, Hideki Takami, Editors, Proc. SPIE 9147 (2014)"

Published
2014
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3. Correction to: PIXL: Planetary Instrument for X-Ray Lithochemistry

Author

Allwood, Abigail C., Wade, Lawrence A., Foote, Marc C., Elam, William Timothy, Hurowitz, Joel A., Battel, Steven, Dawson, Douglas E., Denise, Robert W., Ek, Eric M., Gilbert, Martin S., King, Matthew E., Liebe, Carl Christian, Parker, Todd, Pedersen, David A. K., Randall, David P., Sharrow, Robert F., Sondheim, Michael E., Allen, George, Arnett, Kenneth, Au, Mitchell H., Basset, Christophe, Benn, Mathias, Bousman, John C., Braun, David, Calvet, Robert J., Clark, Benton, Cinquini, Luca, Conaby, Sterling, Conley, Henry A., Davidoff, Scott, Delaney, Jenna, Denver, Troelz, Diaz, Ernesto, Doran, Gary B., Ervin, Joan, Evans, Michael, Flannery, David T., Gao, Ning, Gross, Johannes, Grotzinger, John, Hannah, Brett, Harris, Jackson T., Harris, Cathleen M., He, Yejun, Heirwegh, Christopher M., Hernandez, Christina, Hertzberg, Eric, Hodyss, Robert P., Holden, James R., Hummel, Christopher, Jadusingh, Matthew A., Jørgensen, John L., Kawamura, Jonathan H., Kitiyakara, Amarit, Kozaczek, Kris, Lambert, James L., Lawson, Peter R., Liu, Yang, Luchik, Thomas S., Macneal, Kristen M., Madsen, Soren N., McLennan, Scott M., McNally, Patrick, Meras, Patrick L., Muller, Richard E., Napoli, Jamie, Naylor, Bret J., Nemere, Peter, Ponomarev, Igor, Perez, Raul M., Pootrakul, Napat, Romero, Raul A., Rosas, Rogelio, Sachs, Jared, Schaefer, Rembrandt T., Schein, Michael E., Setterfield, Timothy P., Singh, Vritika, Song, Eugenie, Soria, Mary M., Stek, Paul C., Tallarida, Nicholas R., Thompson, David R., Tice, Michael M., Timmermann, Lars, Torossian, Violet, Treiman, Allan, Tsai, Shihchuan, Uckert, Kyle, Villalvazo, Juan, Wang, Mandy, Wilson, Daniel W., Worel, Shana C., Zamani, Payam, Zappe, Mike, Zhong, Fang, and Zimmerman, Richard

Published
2021
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4. PIXL: Planetary Instrument for X-Ray Lithochemistry

Author

Allwood, Abigail C., Wade, Lawrence A., Foote, Marc C., Elam, William Timothy, Hurowitz, Joel A., Battel, Steven, Dawson, Douglas E., Denise, Robert W., Ek, Eric M., Gilbert, Martin S., King, Matthew E., Liebe, Carl Christian, Parker, Todd, Pedersen, David A. K., Randall, David P., Sharrow, Robert F., Sondheim, Michael E., Allen, George, Arnett, Kenneth, Au, Mitchell H., Basset, Christophe, Benn, Mathias, Bousman, John C., Braun, David, Calvet, Robert J., Clark, Benton, Cinquini, Luca, Conaby, Sterling, Conley, Henry A., Davidoff, Scott, Delaney, Jenna, Denver, Troelz, Diaz, Ernesto, Doran, Gary B., Ervin, Joan, Evans, Michael, Flannery, David O., Gao, Ning, Gross, Johannes, Grotzinger, John, Hannah, Brett, Harris, Jackson T., Harris, Cathleen M., He, Yejun, Heirwegh, Christopher M., Hernandez, Christina, Hertzberg, Eric, Hodyss, Robert P., Holden, James R., Hummel, Christopher, Jadusingh, Matthew A., Jørgensen, John L., Kawamura, Jonathan H., Kitiyakara, Amarit, Kozaczek, Kris, Lambert, James L., Lawson, Peter R., Liu, Yang, Luchik, Thomas S., Macneal, Kristen M., Madsen, Soren N., McLennan, Scott M., McNally, Patrick, Meras, Patrick L., Muller, Richard E., Napoli, Jamie, Naylor, Bret J., Nemere, Peter, Ponomarev, Igor, Perez, Raul M., Pootrakul, Napat, Romero, Raul A., Rosas, Rogelio, Sachs, Jared, Schaefer, Rembrandt T., Schein, Michael E., Setterfield, Timothy P., Singh, Vritika, Song, Eugenie, Soria, Mary M., Stek, Paul C., Tallarida, Nicholas R., Thompson, David R., Tice, Michael M., Timmermann, Lars, Torossian, Violet, Treiman, Allan, Tsai, Shihchuan, Uckert, Kyle, Villalvazo, Juan, Wang, Mandy, Wilson, Daniel W., Worel, Shana C., Zamani, Payam, Zappe, Mike, Zhong, Fang, and Zimmerman, Richard

Published
2020
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5. Correction to: PIXL: Planetary Instrument for X-Ray Lithochemistry (Space Science Reviews, (2020), 216, 8, (134), 10.1007/s11214-020-00767-7)

Author

Allwood, Abigail C., Wade, Lawrence A., Foote, Marc C., Elam, William Timothy, Hurowitz, Joel A., Battel, Steven, Dawson, Douglas E., Denise, Robert W., Ek, Eric M., Gilbert, Martin S., King, Matthew E., Liebe, Carl Christian, Parker, Todd, Pedersen, David A.K., Randall, David P., Sharrow, Robert F., Sondheim, Michael E., Allen, George, Arnett, Kenneth, Au, Mitchell H., Basset, Christophe, Benn, Mathias, Bousman, John C., Braun, David, Calvet, Robert J., Clark, Benton, Cinquini, Luca, Conaby, Sterling, Conley, Henry A., Davidoff, Scott, Delaney, Jenna, Denver, Troelz, Diaz, Ernesto, Doran, Gary B., Ervin, Joan, Evans, Michael, Flannery, David T., Gao, Ning, Gross, Johannes, Grotzinger, John, Hannah, Brett, Harris, Jackson T., Harris, Cathleen M., He, Yejun, Heirwegh, Christopher M., Hernandez, Christina, Hertzberg, Eric, Hodyss, Robert P., Holden, James R., Hummel, Christopher, Jadusingh, Matthew A., Jørgensen, John L., Kawamura, Jonathan H., Kitiyakara, Amarit, Kozaczek, Kris, Lambert, James L., Lawson, Peter R., Liu, Yang, Luchik, Thomas S., Macneal, Kristen M., Madsen, Soren N., McLennan, Scott M., McNally, Patrick, Meras, Patrick L., Muller, Richard E., Napoli, Jamie, Naylor, Bret J., Nemere, Peter, Ponomarev, Igor, Perez, Raul M., Pootrakul, Napat, Romero, Raul A., Rosas, Rogelio, Sachs, Jared, Schaefer, Rembrandt T., Schein, Michael E., Setterfield, Timothy P., Singh, Vritika, Song, Eugenie, Soria, Mary M., Stek, Paul C., Tallarida, Nicholas R., Thompson, David R., Tice, Michael M., Timmermann, Lars, Torossian, Violet, Treiman, Allan, Tsai, Shihchuan, Uckert, Kyle, Villalvazo, Juan, Wang, Mandy, Wilson, Daniel W., Worel, Shana C., Zamani, Payam, Zappe, Mike, Zhong, Fang, Zimmerman, Richard, Allwood, Abigail C., Wade, Lawrence A., Foote, Marc C., Elam, William Timothy, Hurowitz, Joel A., Battel, Steven, Dawson, Douglas E., Denise, Robert W., Ek, Eric M., Gilbert, Martin S., King, Matthew E., Liebe, Carl Christian, Parker, Todd, Pedersen, David A.K., Randall, David P., Sharrow, Robert F., Sondheim, Michael E., Allen, George, Arnett, Kenneth, Au, Mitchell H., Basset, Christophe, Benn, Mathias, Bousman, John C., Braun, David, Calvet, Robert J., Clark, Benton, Cinquini, Luca, Conaby, Sterling, Conley, Henry A., Davidoff, Scott, Delaney, Jenna, Denver, Troelz, Diaz, Ernesto, Doran, Gary B., Ervin, Joan, Evans, Michael, Flannery, David T., Gao, Ning, Gross, Johannes, Grotzinger, John, Hannah, Brett, Harris, Jackson T., Harris, Cathleen M., He, Yejun, Heirwegh, Christopher M., Hernandez, Christina, Hertzberg, Eric, Hodyss, Robert P., Holden, James R., Hummel, Christopher, Jadusingh, Matthew A., Jørgensen, John L., Kawamura, Jonathan H., Kitiyakara, Amarit, Kozaczek, Kris, Lambert, James L., Lawson, Peter R., Liu, Yang, Luchik, Thomas S., Macneal, Kristen M., Madsen, Soren N., McLennan, Scott M., McNally, Patrick, Meras, Patrick L., Muller, Richard E., Napoli, Jamie, Naylor, Bret J., Nemere, Peter, Ponomarev, Igor, Perez, Raul M., Pootrakul, Napat, Romero, Raul A., Rosas, Rogelio, Sachs, Jared, Schaefer, Rembrandt T., Schein, Michael E., Setterfield, Timothy P., Singh, Vritika, Song, Eugenie, Soria, Mary M., Stek, Paul C., Tallarida, Nicholas R., Thompson, David R., Tice, Michael M., Timmermann, Lars, Torossian, Violet, Treiman, Allan, Tsai, Shihchuan, Uckert, Kyle, Villalvazo, Juan, Wang, Mandy, Wilson, Daniel W., Worel, Shana C., Zamani, Payam, Zappe, Mike, Zhong, Fang, and Zimmerman, Richard

Abstract

In section: 3 X-Ray Source 3.1 X-Ray Source Overview The following text should not be present: “The X-ray source combines components from multiple organizations. The high-voltage power supply (HVPS), which includes the LVCM, HVMM, and connecting cables, was designed and built by Battel Engineering and the University of Michigan Space Physics Research Laboratory (SPRL). The X-ray tube was designed and built by Moxtek Inc., and the X-ray optic was designed and built by XOS Inc. XOS aligned and integrated the X-ray tube and optic, while SPRL integrated this tube/optic assembly into the XRSA.” Please also find the corrected: Appendix A: Parameters This is a complete list of parameters that are in place when a scan is initiated that are returned in data products. All of these can be changed by uplink (Table presented.).

Published
2021

6. Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph

Author

Sugai, Hajime, primary, Tamura, Naoyuki, additional, Karoji, Hiroshi, additional, Shimono, Atsushi, additional, Takato, Naruhisa, additional, Kimura, Masahiko, additional, Ohyama, Youichi, additional, Ueda, Akitoshi, additional, Aghazarian, Hrand, additional, de Arruda, Marcio Vital, additional, Barkhouser, Robert H., additional, Bennett, Charles L., additional, Bickerton, Steve, additional, Bozier, Alexandre, additional, Braun, David F., additional, Bui, Khanh, additional, Capocasale, Christopher M., additional, Carr, Michael A., additional, Castilho, Bruno, additional, Chang, Yin-Chang, additional, Chen, Hsin-Yo, additional, Chou, Richard C. Y., additional, Dawson, Olivia R., additional, Dekany, Richard G., additional, Ek, Eric M., additional, Ellis, Richard S., additional, English, Robin J., additional, Ferrand, Didier, additional, Ferreira, Décio, additional, Fisher, Charles D., additional, Golebiowski, Mirek, additional, Gunn, James E., additional, Hart, Murdock, additional, Heckman, Timothy M., additional, Ho, Paul T. P., additional, Hope, Stephen, additional, Hovland, Larry E., additional, Hsu, Shu-Fu, additional, Hu, Yen-Shan, additional, Huang, Pin Jie, additional, Jaquet, Marc, additional, Karr, Jennifer E., additional, Kempenaar, Jason G., additional, King, Matthew E., additional, Fèvre, Olivier Le, additional, Mignant, David Le, additional, Ling, Hung-Hsu, additional, Loomis, Craig, additional, Lupton, Robert H., additional, Madec, Fabrice, additional, Mao, Peter, additional, Marrara, Lucas Souza, additional, Ménard, Brice, additional, Morantz, Chaz, additional, Murayama, Hitoshi, additional, Murray, Graham J., additional, de Oliveira, Antonio Cesar, additional, de Oliveira, Claudia Mendes, additional, de Oliveira, Ligia Souza, additional, Orndorff, Joe D., additional, de Paiva Vilaça, Rodrigo, additional, Partos, Eamon J., additional, Pascal, Sandrine, additional, Pegot-Ogier, Thomas, additional, Reiley, Daniel J., additional, Riddle, Reed, additional, Santos, Leandro, additional, dos Santos, Jesulino Bispo, additional, Schwochert, Mark A., additional, Seiffert, Michael D., additional, Smee, Stephen A., additional, Smith, Roger M., additional, Steinkraus, Ronald E., additional, Sodré, Laerte, additional, Spergel, David N., additional, Surace, Christian, additional, Tresse, Laurence, additional, Vidal, Clément, additional, Vives, Sebastien, additional, Wang, Shiang-Yu, additional, Wen, Chih-Yi, additional, Wu, Amy C., additional, Wyse, Rosie, additional, and Yan, Chi-Hung, additional

Published
2015
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7. Progress with the Prime Focus Spectrograph for the Subaru Telescope: a massively multiplexed optical and near-infrared fiber spectrograph

Author

Sugai, Hajime, additional, Tamura, Naoyuki, additional, Karoji, Hiroshi, additional, Shimono, Atsushi, additional, Takato, Naruhisa, additional, Kimura, Masahiko, additional, Ohyama, Youichi, additional, Ueda, Akitoshi, additional, Aghazarian, Hrand, additional, de Arruda, Marcio V., additional, Barkhouser, Robert H., additional, Bennett, Charles L., additional, Bickerton, Steve, additional, Bozier, Alexandre, additional, Braun, David F., additional, Bui, Khanh, additional, Capocasale, Christopher M., additional, Carr, Michael A., additional, Castilho, Bruno, additional, Chang, Yin-Chang, additional, Chen, Hsin-Yo, additional, Chou, Richard C. Y., additional, Dawson, Olivia R., additional, Dekany, Richard G., additional, Ek, Eric M., additional, Ellis, Richard S., additional, English, Robin J., additional, Ferrand, Didier, additional, Ferreira, Décio, additional, Fisher, Charles D., additional, Golebiowski, Mirek, additional, Gunn, James E., additional, Hart, Murdock, additional, Heckman, Timothy M., additional, Ho, Paul T. P., additional, Hope, Stephen, additional, Hovland, Larry E., additional, Hsu, Shu-Fu, additional, Hu, Yen-Sang, additional, Huang, Pin Jie, additional, Jaquet, Marc, additional, Karr, Jennifer E., additional, Kempenaar, Jason G., additional, King, Matthew E., additional, Le Fèvre, Olivier, additional, Le Mignant, David, additional, Ling, Hung-Hsu, additional, Loomis, Craig, additional, Lupton, Robert H., additional, Madec, Fabrice, additional, Mao, Peter, additional, Marrara, Lucas S., additional, Ménard, Brice, additional, Morantz, Chaz, additional, Murayama, Hitoshi, additional, Murray, Graham J., additional, de Oliveira, Antonio Cesar, additional, de Oliveira, Claudia M., additional, de Oliveira, Ligia S., additional, Orndorff, Joe D., additional, de Paiva Vilaça, Rodrigo, additional, Partos, Eamon J., additional, Pascal, Sandrine, additional, Pegot-Ogier, Thomas, additional, Reiley, Daniel J., additional, Riddle, Reed, additional, Santos, Leandro, additional, dos Santos, Jesulino B., additional, Schwochert, Mark A., additional, Seiffert, Michael D., additional, Smee, Stephen A., additional, Smith, Roger M., additional, Steinkraus, Ronald E., additional, Sodré, Laerte, additional, Spergel, David N., additional, Surace, Christian, additional, Tresse, Laurence, additional, Vidal, Clément, additional, Vives, Sebastien, additional, Wang, Shiang-Yu, additional, Wen, Chih-Yi, additional, Wu, Amy C., additional, Wyse, Rosie, additional, and Yan, Chi-Hung, additional

Published
2014
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8. Progress with the Prime Focus Spectrograph for the Subaru Telescope: a massively multiplexed optical and near-infrared fiber spectrograph

Author

Ramsay, Suzanne K., McLean, Ian S., Takami, Hideki, Sugai, Hajime, Tamura, Naoyuki, Karoji, Hiroshi, Shimono, Atsushi, Takato, Naruhisa, Kimura, Masahiko, Ohyama, Youichi, Ueda, Akitoshi, Aghazarian, Hrand, de Arruda, Marcio V., Barkhouser, Robert H., Bennett, Charles L., Bickerton, Steve, Bozier, Alexandre, Braun, David F., Bui, Khanh, Capocasale, Christopher M., Carr, Michael A., Castilho, Bruno, Chang, Yin-Chang, Chen, Hsin-Yo, Chou, Richard C. Y., Dawson, Olivia R., Dekany, Richard G., Ek, Eric M., Ellis, Richard S., English, Robin J., Ferrand, Didier, Ferreira, Décio, Fisher, Charles D., Golebiowski, Mirek, Gunn, James E., Hart, Murdock, Heckman, Timothy M., Ho, Paul T. P., Hope, Stephen, Hovland, Larry E., Hsu, Shu-Fu, Hu, Yen-Sang, Huang, Pin Jie, Jaquet, Marc, Karr, Jennifer E., Kempenaar, Jason G., King, Matthew E., Le Fèvre, Olivier, Le Mignant, David, Ling, Hung-Hsu, Loomis, Craig, Lupton, Robert H., Madec, Fabrice, Mao, Peter, Marrara, Lucas S., Ménard, Brice, Morantz, Chaz, Murayama, Hitoshi, Murray, Graham J., de Oliveira, Antonio Cesar, de Oliveira, Claudia M., de Oliveira, Ligia S., Orndorff, Joe D., de Paiva Vilaça, Rodrigo, Partos, Eamon J., Pascal, Sandrine, Pegot-Ogier, Thomas, Reiley, Daniel J., Riddle, Reed, Santos, Leandro, dos Santos, Jesulino B., Schwochert, Mark A., Seiffert, Michael D., Smee, Stephen A., Smith, Roger M., Steinkraus, Ronald E., Sodré, Laerte, Spergel, David N., Surace, Christian, Tresse, Laurence, Vidal, Clément, Vives, Sebastien, Wang, Shiang-Yu, Wen, Chih-Yi, Wu, Amy C., Wyse, Rosie, and Yan, Chi-Hung

Published
2014
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9. Low Thermal Stress Electrode.

Author

DEPARTMENT OF THE ARMY WASHINGTON DC, Ek,Eric M, DEPARTMENT OF THE ARMY WASHINGTON DC, and Ek,Eric M

Abstract

A collector for use in a travelling wave tube includes a central metallic core that has a peripheral ceramic insulator with the central metallic core having a plurality of circumferentially spaced primary slots extending inwardly from the periphery and an equal number of secondary slots extending perpendicular to the primary slots adjacent the periphery of the electrode. The primary slots define a plurality of fingers and the secondary slots act as hinges for the fingers.

Published
1981

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